OK, let's work through this together. We're starting with 809 and we're going to multiply it by 491, which means we add 809 to itself 491 times.
Step 1: 0 + 809 = 809
Step 2: 809 + 809 = 1618
Step 3: 1618 + 809 = 2427
Step 4: 2427 + 809 = 3236
Step 5: 3236 + 809 = 4045
Step 6: 4045 + 809 = 4854
Step 7: 4854 + 809 = 5663
Step 8: 5663 + 809 = 6472
Step 9: 6472 + 809 = 7281
Step 10: 7281 + 809 = 8090
Step 11: 8090 + 809 = 8899
Step 12: 8899 + 809 = 9708
Step 13: 9708 + 809 = 10517
Step 14: 10517 + 809 = 11326
Step 15: 11326 + 809 = 12135
Step 16: 12135 + 809 = 12944
Step 17: 12944 + 809 = 13753
Step 18: 13753 + 809 = 14562
Step 19: 14562 + 809 = 15371
Step 20: 15371 + 809 = 16180
Step 21: 16180 + 809 = 16989
Step 22: 16989 + 809 = 17798
Step 23: 17798 + 809 = 18607
Step 24: 18607 + 809 = 19416
Step 25: 19416 + 809 = 20225
Step 26: 20225 + 809 = 21034
Step 27: 21034 + 809 = 21843
Step 28: 21843 + 809 = 22652
Step 29: 22652 + 809 = 23461
Step 30: 23461 + 809 = 24270
Step 31: 24270 + 809 = 25079
Step 32: 25079 + 809 = 25888
Step 33: 25888 + 809 = 26697
Step 34: 26697 + 809 = 27506
Step 35: 27506 + 809 = 28315
Step 36: 28315 + 809 = 29124
Step 37: 29124 + 809 = 29933
Step 38: 29933 + 809 = 30742
Step 39: 30742 + 809 = 31551
Step 40: 31551 + 809 = 32360
Step 41: 32360 + 809 = 33169
Step 42: 33169 + 809 = 33978
Step 43: 33978 + 809 = 34787
Step 44: 34787 + 809 = 35596
Step 45: 35596 + 809 = 36405
Step 46: 36405 + 809 = 37214
Step 47: 37214 + 809 = 38023
Step 48: 38023 + 809 = 38832
Step 49: 38832 + 809 = 39641
Step 50: 39641 + 809 = 40450
Step 51: 40450 + 809 = 41259
Step 52: 41259 + 809 = 42068
Step 53: 42068 + 809 = 42877
Step 54: 42877 + 809 = 43686
Step 55: 43686 + 809 = 44495
Step 56: 44495 + 809 = 45304
Step 57: 45304 + 809 = 46113
Step 58: 46113 + 809 = 46922
Step 59: 46922 + 809 = 47731
Step 60: 47731 + 809 = 48540
Step 61: 48540 + 809 = 49349
Step 62: 49349 + 809 = 50158
Step 63: 50158 + 809 = 50967
Step 64: 50967 + 809 = 51776
Step 65: 51776 + 809 = 52585
Step 66: 52585 + 809 = 53394
Step 67: 53394 + 809 = 54203
Step 68: 54203 + 809 = 55012
Step 69: 55012 + 809 = 55821
Step 70: 55821 + 809 = 56630
Step 71: 56630 + 809 = 57439
Step 72: 57439 + 809 = 58248
Step 73: 58248 + 809 = 59057
Step 74: 59057 + 809 = 59866
Step 75: 59866 + 809 = 60675
Step 76: 60675 + 809 = 61484
Step 77: 61484 + 809 = 62293
Step 78: 62293 + 809 = 63102
Step 79: 63102 + 809 = 63911
Step 80: 63911 + 809 = 64720
Step 81: 64720 + 809 = 65529
Step 82: 65529 + 809 = 66338
Step 83: 66338 + 809 = 67147
Step 84: 67147 + 809 = 67956
Step 85: 67956 + 809 = 68765
Step 86: 68765 + 809 = 69574
Step 87: 69574 + 809 = 70383
Step 88: 70383 + 809 = 71192
Step 89: 71192 + 809 = 72001
Step 90: 72001 + 809 = 72810
Step 91: 72810 + 809 = 73619
Step 92: 73619 + 809 = 74428
Step 93: 74428 + 809 = 75237
Step 94: 75237 + 809 = 76046
Step 95: 76046 + 809 = 76855
Step 96: 76855 + 809 = 77664
Step 97: 77664 + 809 = 78473
Step 98: 78473 + 809 = 79282
Step 99: 79282 + 809 = 80091
Step 100: 80091 + 809 = 80900
Step 101: 80900 + 809 = 81709
Step 102: 81709 + 809 = 82518
Step 103: 82518 + 809 = 83327
Step 104: 83327 + 809 = 84136
Step 105: 84136 + 809 = 84945
Step 106: 84945 + 809 = 85754
Step 107: 85754 + 809 = 86563
Step 108: 86563 + 809 = 87372
Step 109: 87372 + 809 = 88181
Step 110: 88181 + 809 = 88990
Step 111: 88990 + 809 = 89799
Step 112: 89799 + 809 = 90608
Step 113: 90608 + 809 = 91417
Step 114: 91417 + 809 = 92226
Step 115: 92226 + 809 = 93035
Step 116: 93035 + 809 = 93844
Step 117: 93844 + 809 = 94653
Step 118: 94653 + 809 = 95462
Step 119: 95462 + 809 = 96271
Step 120: 96271 + 809 = 97080
Step 121: 97080 + 809 = 97889
Step 122: 97889 + 809 = 98698
Step 123: 98698 + 809 = 99507
Step 124: 99507 + 809 = 100316
Step 125: 100316 + 809 = 101125
Step 126: 101125 + 809 = 101934
Step 127: 101934 + 809 = 102743
Step 128: 102743 + 809 = 103552
Step 129: 103552 + 809 = 104361
Step 130: 104361 + 809 = 105170
Step 131: 105170 + 809 = 105979
Step 132: 105979 + 809 = 106788
Step 133: 106788 + 809 = 107597
Step 134: 107597 + 809 = 108406
Step 135: 108406 + 809 = 109215
Step 136: 109215 + 809 = 110024
Step 137: 110024 + 809 = 110833
Step 138: 110833 + 809 = 111642
Step 139: 111642 + 809 = 112451
Step 140: 112451 + 809 = 113260
Step 141: 113260 + 809 = 114069
Step 142: 114069 + 809 = 114878
Step 143: 114878 + 809 = 115687
Step 144: 115687 + 809 = 116496
Step 145: 116496 + 809 = 117305
Step 146: 117305 + 809 = 118114
Step 147: 118114 + 809 = 118923
Step 148: 118923 + 809 = 119732
Step 149: 119732 + 809 = 120541
Step 150: 120541 + 809 = 121350
Step 151: 121350 + 809 = 122159
Step 152: 122159 + 809 = 122968
Step 153: 122968 + 809 = 123777
Step 154: 123777 + 809 = 124586
Step 155: 124586 + 809 = 125395
Step 156: 125395 + 809 = 126204
Step 157: 126204 + 809 = 127013
Step 158: 127013 + 809 = 127822
Step 159: 127822 + 809 = 128631
Step 160: 128631 + 809 = 129440
Step 161: 129440 + 809 = 130249
Step 162: 130249 + 809 = 131058
Step 163: 131058 + 809 = 131867
Step 164: 131867 + 809 = 132676
Step 165: 132676 + 809 = 133485
Step 166: 133485 + 809 = 134294
Step 167: 134294 + 809 = 135103
Step 168: 135103 + 809 = 135912
Step 169: 135912 + 809 = 136721
Step 170: 136721 + 809 = 137530
Step 171: 137530 + 809 = 138339
Step 172: 138339 + 809 = 139148
Step 173: 139148 + 809 = 139957
Step 174: 139957 + 809 = 140766
Step 175: 140766 + 809 = 141575
Step 176: 141575 + 809 = 142384
Step 177: 142384 + 809 = 143193
Step 178: 143193 + 809 = 144002
Step 179: 144002 + 809 = 144811
Step 180: 144811 + 809 = 145620
Step 181: 145620 + 809 = 146429
Step 182: 146429 + 809 = 147238
Step 183: 147238 + 809 = 148047
Step 184: 148047 + 809 = 148856
Step 185: 148856 + 809 = 149665
Step 186: 149665 + 809 = 150474
Step 187: 150474 + 809 = 151283
Step 188: 151283 + 809 = 152092
Step 189: 152092 + 809 = 152901
Step 190: 152901 + 809 = 153710
Step 191: 153710 + 809 = 154519
Step 192: 154519 + 809 = 155328
Step 193: 155328 + 809 = 156137
Step 194: 156137 + 809 = 156946
Step 195: 156946 + 809 = 157755
Step 196: 157755 + 809 = 158564
Step 197: 158564 + 809 = 159373
Step 198: 159373 + 809 = 160182
Step 199: 160182 + 809 = 160991
Step 200: 160991 + 809 = 161800
Step 201: 161800 + 809 = 162609
Step 202: 162609 + 809 = 163418
Step 203: 163418 + 809 = 164227
Step 204: 164227 + 809 = 165036
Step 205: 165036 + 809 = 165845
Step 206: 165845 + 809 = 166654
Step 207: 166654 + 809 = 167463
Step 208: 167463 + 809 = 168272
Step 209: 168272 + 809 = 169081
Step 210: 169081 + 809 = 169890
Step 211: 169890 + 809 = 170699
Step 212: 170699 + 809 = 171508
Step 213: 171508 + 809 = 172317
Step 214: 172317 + 809 = 173126
Step 215: 173126 + 809 = 173935
Step 216: 173935 + 809 = 174744
Step 217: 174744 + 809 = 175553
Step 218: 175553 + 809 = 176362
Step 219: 176362 + 809 = 177171
Step 220: 177171 + 809 = 177980
Step 221: 177980 + 809 = 178789
Step 222: 178789 + 809 = 179598
Step 223: 179598 + 809 = 180407
Step 224: 180407 + 809 = 181216
Step 225: 181216 + 809 = 182025
Step 226: 182025 + 809 = 182834
Step 227: 182834 + 809 = 183643
Step 228: 183643 + 809 = 184452
Step 229: 184452 + 809 = 185261
Step 230: 185261 + 809 = 186070
Step 231: 186070 + 809 = 186879
Step 232: 186879 + 809 = 187688
Step 233: 187688 + 809 = 188497
Step 234: 188497 + 809 = 189306
Step 235: 189306 + 809 = 190115
Step 236: 190115 + 809 = 190924
Step 237: 190924 + 809 = 191733
Step 238: 191733 + 809 = 192542
Step 239: 192542 + 809 = 193351
Step 240: 193351 + 809 = 194160
Step 241: 194160 + 809 = 194969
Step 242: 194969 + 809 = 195778
Step 243: 195778 + 809 = 196587
Step 244: 196587 + 809 = 197396
Step 245: 197396 + 809 = 198205
Step 246: 198205 + 809 = 199014
Step 247: 199014 + 809 = 199823
Step 248: 199823 + 809 = 200632
Step 249: 200632 + 809 = 201441
Step 250: 201441 + 809 = 202250
Step 251: 202250 + 809 = 203059
Step 252: 203059 + 809 = 203868
Step 253: 203868 + 809 = 204677
Step 254: 204677 + 809 = 205486
Step 255: 205486 + 809 = 206295
Step 256: 206295 + 809 = 207104
Step 257: 207104 + 809 = 207913
Step 258: 207913 + 809 = 208722
Step 259: 208722 + 809 = 209531
Step 260: 209531 + 809 = 210340
Step 261: 210340 + 809 = 211149
Step 262: 211149 + 809 = 211958
Step 263: 211958 + 809 = 212767
Step 264: 212767 + 809 = 213576
Step 265: 213576 + 809 = 214385
Step 266: 214385 + 809 = 215194
Step 267: 215194 + 809 = 216003
Step 268: 216003 + 809 = 216812
Step 269: 216812 + 809 = 217621
Step 270: 217621 + 809 = 218430
Step 271: 218430 + 809 = 219239
Step 272: 219239 + 809 = 220048
Step 273: 220048 + 809 = 220857
Step 274: 220857 + 809 = 221666
Step 275: 221666 + 809 = 222475
Step 276: 222475 + 809 = 223284
Step 277: 223284 + 809 = 224093
Step 278: 224093 + 809 = 224902
Step 279: 224902 + 809 = 225711
Step 280: 225711 + 809 = 226520
Step 281: 226520 + 809 = 227329
Step 282: 227329 + 809 = 228138
Step 283: 228138 + 809 = 228947
Step 284: 228947 + 809 = 229756
Step 285: 229756 + 809 = 230565
Step 286: 230565 + 809 = 231374
Step 287: 231374 + 809 = 232183
Step 288: 232183 + 809 = 232992
Step 289: 232992 + 809 = 233801
Step 290: 233801 + 809 = 234610
Step 291: 234610 + 809 = 235419
Step 292: 235419 + 809 = 236228
Step 293: 236228 + 809 = 237037
Step 294: 237037 + 809 = 237846
Step 295: 237846 + 809 = 238655
Step 296: 238655 + 809 = 239464
Step 297: 239464 + 809 = 240273
Step 298: 240273 + 809 = 241082
Step 299: 241082 + 809 = 241891
Step 300: 241891 + 809 = 242700
Step 301: 242700 + 809 = 243509
Step 302: 243509 + 809 = 244318
Step 303: 244318 + 809 = 245127
Step 304: 245127 + 809 = 245936
Step 305: 245936 + 809 = 246745
Step 306: 246745 + 809 = 247554
Step 307: 247554 + 809 = 248363
Step 308: 248363 + 809 = 249172
Step 309: 249172 + 809 = 249981
Step 310: 249981 + 809 = 250790
Step 311: 250790 + 809 = 251599
Step 312: 251599 + 809 = 252408
Step 313: 252408 + 809 = 253217
Step 314: 253217 + 809 = 254026
Step 315: 254026 + 809 = 254835
Step 316: 254835 + 809 = 255644
Step 317: 255644 + 809 = 256453
Step 318: 256453 + 809 = 257262
Step 319: 257262 + 809 = 258071
Step 320: 258071 + 809 = 258880
Step 321: 258880 + 809 = 259689
Step 322: 259689 + 809 = 260498
Step 323: 260498 + 809 = 261307
Step 324: 261307 + 809 = 262116
Step 325: 262116 + 809 = 262925
Step 326: 262925 + 809 = 263734
Step 327: 263734 + 809 = 264543
Step 328: 264543 + 809 = 265352
Step 329: 265352 + 809 = 266161
Step 330: 266161 + 809 = 266970
Step 331: 266970 + 809 = 267779
Step 332: 267779 + 809 = 268588
Step 333: 268588 + 809 = 269397
Step 334: 269397 + 809 = 270206
Step 335: 270206 + 809 = 271015
Step 336: 271015 + 809 = 271824
Step 337: 271824 + 809 = 272633
Step 338: 272633 + 809 = 273442
Step 339: 273442 + 809 = 274251
Step 340: 274251 + 809 = 275060
Step 341: 275060 + 809 = 275869
Step 342: 275869 + 809 = 276678
Step 343: 276678 + 809 = 277487
Step 344: 277487 + 809 = 278296
Step 345: 278296 + 809 = 279105
Step 346: 279105 + 809 = 279914
Step 347: 279914 + 809 = 280723
Step 348: 280723 + 809 = 281532
Step 349: 281532 + 809 = 282341
Step 350: 282341 + 809 = 283150
Step 351: 283150 + 809 = 283959
Step 352: 283959 + 809 = 284768
Step 353: 284768 + 809 = 285577
Step 354: 285577 + 809 = 286386
Step 355: 286386 + 809 = 287195
Step 356: 287195 + 809 = 288004
Step 357: 288004 + 809 = 288813
Step 358: 288813 + 809 = 289622
Step 359: 289622 + 809 = 290431
Step 360: 290431 + 809 = 291240
Step 361: 291240 + 809 = 292049
Step 362: 292049 + 809 = 292858
Step 363: 292858 + 809 = 293667
Step 364: 293667 + 809 = 294476
Step 365: 294476 + 809 = 295285
Step 366: 295285 + 809 = 296094
Step 367: 296094 + 809 = 296903
Step 368: 296903 + 809 = 297712
Step 369: 297712 + 809 = 298521
Step 370: 298521 + 809 = 299330
Step 371: 299330 + 809 = 300139
Step 372: 300139 + 809 = 300948
Step 373: 300948 + 809 = 301757
Step 374: 301757 + 809 = 302566
Step 375: 302566 + 809 = 303375
Step 376: 303375 + 809 = 304184
Step 377: 304184 + 809 = 304993
Step 378: 304993 + 809 = 305802
Step 379: 305802 + 809 = 306611
Step 380: 306611 + 809 = 307420
Step 381: 307420 + 809 = 308229
Step 382: 308229 + 809 = 309038
Step 383: 309038 + 809 = 309847
Step 384: 309847 + 809 = 310656
Step 385: 310656 + 809 = 311465
Step 386: 311465 + 809 = 312274
Step 387: 312274 + 809 = 313083
Step 388: 313083 + 809 = 313892
Step 389: 313892 + 809 = 314701
Step 390: 314701 + 809 = 315510
Step 391: 315510 + 809 = 316319
Step 392: 316319 + 809 = 317128
Step 393: 317128 + 809 = 317937
Step 394: 317937 + 809 = 318746
Step 395: 318746 + 809 = 319555
Step 396: 319555 + 809 = 320364
Step 397: 320364 + 809 = 321173
Step 398: 321173 + 809 = 321982
Step 399: 321982 + 809 = 322791
Step 400: 322791 + 809 = 323600
Step 401: 323600 + 809 = 324409
Step 402: 324409 + 809 = 325218
Step 403: 325218 + 809 = 326027
Step 404: 326027 + 809 = 326836
Step 405: 326836 + 809 = 327645
Step 406: 327645 + 809 = 328454
Step 407: 328454 + 809 = 329263
Step 408: 329263 + 809 = 330072
Step 409: 330072 + 809 = 330881
Step 410: 330881 + 809 = 331690
Step 411: 331690 + 809 = 332499
Step 412: 332499 + 809 = 333308
Step 413: 333308 + 809 = 334117
Step 414: 334117 + 809 = 334926
Step 415: 334926 + 809 = 335735
Step 416: 335735 + 809 = 336544
Step 417: 336544 + 809 = 337353
Step 418: 337353 + 809 = 338162
Step 419: 338162 + 809 = 338971
Step 420: 338971 + 809 = 339780
Step 421: 339780 + 809 = 340589
Step 422: 340589 + 809 = 341398
Step 423: 341398 + 809 = 342207
Step 424: 342207 + 809 = 343016
Step 425: 343016 + 809 = 343825
Step 426: 343825 + 809 = 344634
Step 427: 344634 + 809 = 345443
Step 428: 345443 + 809 = 346252
Step 429: 346252 + 809 = 347061
Step 430: 347061 + 809 = 347870
Step 431: 347870 + 809 = 348679
Step 432: 348679 + 809 = 349488
Step 433: 349488 + 809 = 350297
Step 434: 350297 + 809 = 351106
Step 435: 351106 + 809 = 351915
Step 436: 351915 + 809 = 352724
Step 437: 352724 + 809 = 353533
Step 438: 353533 + 809 = 354342
Step 439: 354342 + 809 = 355151
Step 440: 355151 + 809 = 355960
Step 441: 355960 + 809 = 356769
Step 442: 356769 + 809 = 357578
Step 443: 357578 + 809 = 358387
Step 444: 358387 + 809 = 359196
Step 445: 359196 + 809 = 360005
Step 446: 360005 + 809 = 360814
Step 447: 360814 + 809 = 361623
Step 448: 361623 + 809 = 362432
Step 449: 362432 + 809 = 363241
Step 450: 363241 + 809 = 364050
Step 451: 364050 + 809 = 364859
Step 452: 364859 + 809 = 365668
Step 453: 365668 + 809 = 366477
Step 454: 366477 + 809 = 367286
Step 455: 367286 + 809 = 368095
Step 456: 368095 + 809 = 368904
Step 457: 368904 + 809 = 369713
Step 458: 369713 + 809 = 370522
Step 459: 370522 + 809 = 371331
Step 460: 371331 + 809 = 372140
Step 461: 372140 + 809 = 372949
Step 462: 372949 + 809 = 373758
Step 463: 373758 + 809 = 374567
Step 464: 374567 + 809 = 375376
Step 465: 375376 + 809 = 376185
Step 466: 376185 + 809 = 376994
Step 467: 376994 + 809 = 377803
Step 468: 377803 + 809 = 378612
Step 469: 378612 + 809 = 379421
Step 470: 379421 + 809 = 380230
Step 471: 380230 + 809 = 381039
Step 472: 381039 + 809 = 381848
Step 473: 381848 + 809 = 382657
Step 474: 382657 + 809 = 383466
Step 475: 383466 + 809 = 384275
Step 476: 384275 + 809 = 385084
Step 477: 385084 + 809 = 385893
Step 478: 385893 + 809 = 386702
Step 479: 386702 + 809 = 387511
Step 480: 387511 + 809 = 388320
Step 481: 388320 + 809 = 389129
Step 482: 389129 + 809 = 389938
Step 483: 389938 + 809 = 390747
Step 484: 390747 + 809 = 391556
Step 485: 391556 + 809 = 392365
Step 486: 392365 + 809 = 393174
Step 487: 393174 + 809 = 393983
Step 488: 393983 + 809 = 394792
Step 489: 394792 + 809 = 395601
Step 490: 395601 + 809 = 396410
Step 491: 396410 + 809 = 397219

So, 809*491 = 397219