Alright, let's solve this math problem step by step. First, we have the number 809. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 351. So, we're going to take the number 809 and add it to itself 351 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

So, 809*351 = 283959