Without delay, let's solve this. We've got 817 and we will be multiplying it by 455, that is, adding 817 to itself 455 times.
Step 1: 0 + 817 = 817
Step 2: 817 + 817 = 1634
Step 3: 1634 + 817 = 2451
Step 4: 2451 + 817 = 3268
Step 5: 3268 + 817 = 4085
Step 6: 4085 + 817 = 4902
Step 7: 4902 + 817 = 5719
Step 8: 5719 + 817 = 6536
Step 9: 6536 + 817 = 7353
Step 10: 7353 + 817 = 8170
Step 11: 8170 + 817 = 8987
Step 12: 8987 + 817 = 9804
Step 13: 9804 + 817 = 10621
Step 14: 10621 + 817 = 11438
Step 15: 11438 + 817 = 12255
Step 16: 12255 + 817 = 13072
Step 17: 13072 + 817 = 13889
Step 18: 13889 + 817 = 14706
Step 19: 14706 + 817 = 15523
Step 20: 15523 + 817 = 16340
Step 21: 16340 + 817 = 17157
Step 22: 17157 + 817 = 17974
Step 23: 17974 + 817 = 18791
Step 24: 18791 + 817 = 19608
Step 25: 19608 + 817 = 20425
Step 26: 20425 + 817 = 21242
Step 27: 21242 + 817 = 22059
Step 28: 22059 + 817 = 22876
Step 29: 22876 + 817 = 23693
Step 30: 23693 + 817 = 24510
Step 31: 24510 + 817 = 25327
Step 32: 25327 + 817 = 26144
Step 33: 26144 + 817 = 26961
Step 34: 26961 + 817 = 27778
Step 35: 27778 + 817 = 28595
Step 36: 28595 + 817 = 29412
Step 37: 29412 + 817 = 30229
Step 38: 30229 + 817 = 31046
Step 39: 31046 + 817 = 31863
Step 40: 31863 + 817 = 32680
Step 41: 32680 + 817 = 33497
Step 42: 33497 + 817 = 34314
Step 43: 34314 + 817 = 35131
Step 44: 35131 + 817 = 35948
Step 45: 35948 + 817 = 36765
Step 46: 36765 + 817 = 37582
Step 47: 37582 + 817 = 38399
Step 48: 38399 + 817 = 39216
Step 49: 39216 + 817 = 40033
Step 50: 40033 + 817 = 40850
Step 51: 40850 + 817 = 41667
Step 52: 41667 + 817 = 42484
Step 53: 42484 + 817 = 43301
Step 54: 43301 + 817 = 44118
Step 55: 44118 + 817 = 44935
Step 56: 44935 + 817 = 45752
Step 57: 45752 + 817 = 46569
Step 58: 46569 + 817 = 47386
Step 59: 47386 + 817 = 48203
Step 60: 48203 + 817 = 49020
Step 61: 49020 + 817 = 49837
Step 62: 49837 + 817 = 50654
Step 63: 50654 + 817 = 51471
Step 64: 51471 + 817 = 52288
Step 65: 52288 + 817 = 53105
Step 66: 53105 + 817 = 53922
Step 67: 53922 + 817 = 54739
Step 68: 54739 + 817 = 55556
Step 69: 55556 + 817 = 56373
Step 70: 56373 + 817 = 57190
Step 71: 57190 + 817 = 58007
Step 72: 58007 + 817 = 58824
Step 73: 58824 + 817 = 59641
Step 74: 59641 + 817 = 60458
Step 75: 60458 + 817 = 61275
Step 76: 61275 + 817 = 62092
Step 77: 62092 + 817 = 62909
Step 78: 62909 + 817 = 63726
Step 79: 63726 + 817 = 64543
Step 80: 64543 + 817 = 65360
Step 81: 65360 + 817 = 66177
Step 82: 66177 + 817 = 66994
Step 83: 66994 + 817 = 67811
Step 84: 67811 + 817 = 68628
Step 85: 68628 + 817 = 69445
Step 86: 69445 + 817 = 70262
Step 87: 70262 + 817 = 71079
Step 88: 71079 + 817 = 71896
Step 89: 71896 + 817 = 72713
Step 90: 72713 + 817 = 73530
Step 91: 73530 + 817 = 74347
Step 92: 74347 + 817 = 75164
Step 93: 75164 + 817 = 75981
Step 94: 75981 + 817 = 76798
Step 95: 76798 + 817 = 77615
Step 96: 77615 + 817 = 78432
Step 97: 78432 + 817 = 79249
Step 98: 79249 + 817 = 80066
Step 99: 80066 + 817 = 80883
Step 100: 80883 + 817 = 81700
Step 101: 81700 + 817 = 82517
Step 102: 82517 + 817 = 83334
Step 103: 83334 + 817 = 84151
Step 104: 84151 + 817 = 84968
Step 105: 84968 + 817 = 85785
Step 106: 85785 + 817 = 86602
Step 107: 86602 + 817 = 87419
Step 108: 87419 + 817 = 88236
Step 109: 88236 + 817 = 89053
Step 110: 89053 + 817 = 89870
Step 111: 89870 + 817 = 90687
Step 112: 90687 + 817 = 91504
Step 113: 91504 + 817 = 92321
Step 114: 92321 + 817 = 93138
Step 115: 93138 + 817 = 93955
Step 116: 93955 + 817 = 94772
Step 117: 94772 + 817 = 95589
Step 118: 95589 + 817 = 96406
Step 119: 96406 + 817 = 97223
Step 120: 97223 + 817 = 98040
Step 121: 98040 + 817 = 98857
Step 122: 98857 + 817 = 99674
Step 123: 99674 + 817 = 100491
Step 124: 100491 + 817 = 101308
Step 125: 101308 + 817 = 102125
Step 126: 102125 + 817 = 102942
Step 127: 102942 + 817 = 103759
Step 128: 103759 + 817 = 104576
Step 129: 104576 + 817 = 105393
Step 130: 105393 + 817 = 106210
Step 131: 106210 + 817 = 107027
Step 132: 107027 + 817 = 107844
Step 133: 107844 + 817 = 108661
Step 134: 108661 + 817 = 109478
Step 135: 109478 + 817 = 110295
Step 136: 110295 + 817 = 111112
Step 137: 111112 + 817 = 111929
Step 138: 111929 + 817 = 112746
Step 139: 112746 + 817 = 113563
Step 140: 113563 + 817 = 114380
Step 141: 114380 + 817 = 115197
Step 142: 115197 + 817 = 116014
Step 143: 116014 + 817 = 116831
Step 144: 116831 + 817 = 117648
Step 145: 117648 + 817 = 118465
Step 146: 118465 + 817 = 119282
Step 147: 119282 + 817 = 120099
Step 148: 120099 + 817 = 120916
Step 149: 120916 + 817 = 121733
Step 150: 121733 + 817 = 122550
Step 151: 122550 + 817 = 123367
Step 152: 123367 + 817 = 124184
Step 153: 124184 + 817 = 125001
Step 154: 125001 + 817 = 125818
Step 155: 125818 + 817 = 126635
Step 156: 126635 + 817 = 127452
Step 157: 127452 + 817 = 128269
Step 158: 128269 + 817 = 129086
Step 159: 129086 + 817 = 129903
Step 160: 129903 + 817 = 130720
Step 161: 130720 + 817 = 131537
Step 162: 131537 + 817 = 132354
Step 163: 132354 + 817 = 133171
Step 164: 133171 + 817 = 133988
Step 165: 133988 + 817 = 134805
Step 166: 134805 + 817 = 135622
Step 167: 135622 + 817 = 136439
Step 168: 136439 + 817 = 137256
Step 169: 137256 + 817 = 138073
Step 170: 138073 + 817 = 138890
Step 171: 138890 + 817 = 139707
Step 172: 139707 + 817 = 140524
Step 173: 140524 + 817 = 141341
Step 174: 141341 + 817 = 142158
Step 175: 142158 + 817 = 142975
Step 176: 142975 + 817 = 143792
Step 177: 143792 + 817 = 144609
Step 178: 144609 + 817 = 145426
Step 179: 145426 + 817 = 146243
Step 180: 146243 + 817 = 147060
Step 181: 147060 + 817 = 147877
Step 182: 147877 + 817 = 148694
Step 183: 148694 + 817 = 149511
Step 184: 149511 + 817 = 150328
Step 185: 150328 + 817 = 151145
Step 186: 151145 + 817 = 151962
Step 187: 151962 + 817 = 152779
Step 188: 152779 + 817 = 153596
Step 189: 153596 + 817 = 154413
Step 190: 154413 + 817 = 155230
Step 191: 155230 + 817 = 156047
Step 192: 156047 + 817 = 156864
Step 193: 156864 + 817 = 157681
Step 194: 157681 + 817 = 158498
Step 195: 158498 + 817 = 159315
Step 196: 159315 + 817 = 160132
Step 197: 160132 + 817 = 160949
Step 198: 160949 + 817 = 161766
Step 199: 161766 + 817 = 162583
Step 200: 162583 + 817 = 163400
Step 201: 163400 + 817 = 164217
Step 202: 164217 + 817 = 165034
Step 203: 165034 + 817 = 165851
Step 204: 165851 + 817 = 166668
Step 205: 166668 + 817 = 167485
Step 206: 167485 + 817 = 168302
Step 207: 168302 + 817 = 169119
Step 208: 169119 + 817 = 169936
Step 209: 169936 + 817 = 170753
Step 210: 170753 + 817 = 171570
Step 211: 171570 + 817 = 172387
Step 212: 172387 + 817 = 173204
Step 213: 173204 + 817 = 174021
Step 214: 174021 + 817 = 174838
Step 215: 174838 + 817 = 175655
Step 216: 175655 + 817 = 176472
Step 217: 176472 + 817 = 177289
Step 218: 177289 + 817 = 178106
Step 219: 178106 + 817 = 178923
Step 220: 178923 + 817 = 179740
Step 221: 179740 + 817 = 180557
Step 222: 180557 + 817 = 181374
Step 223: 181374 + 817 = 182191
Step 224: 182191 + 817 = 183008
Step 225: 183008 + 817 = 183825
Step 226: 183825 + 817 = 184642
Step 227: 184642 + 817 = 185459
Step 228: 185459 + 817 = 186276
Step 229: 186276 + 817 = 187093
Step 230: 187093 + 817 = 187910
Step 231: 187910 + 817 = 188727
Step 232: 188727 + 817 = 189544
Step 233: 189544 + 817 = 190361
Step 234: 190361 + 817 = 191178
Step 235: 191178 + 817 = 191995
Step 236: 191995 + 817 = 192812
Step 237: 192812 + 817 = 193629
Step 238: 193629 + 817 = 194446
Step 239: 194446 + 817 = 195263
Step 240: 195263 + 817 = 196080
Step 241: 196080 + 817 = 196897
Step 242: 196897 + 817 = 197714
Step 243: 197714 + 817 = 198531
Step 244: 198531 + 817 = 199348
Step 245: 199348 + 817 = 200165
Step 246: 200165 + 817 = 200982
Step 247: 200982 + 817 = 201799
Step 248: 201799 + 817 = 202616
Step 249: 202616 + 817 = 203433
Step 250: 203433 + 817 = 204250
Step 251: 204250 + 817 = 205067
Step 252: 205067 + 817 = 205884
Step 253: 205884 + 817 = 206701
Step 254: 206701 + 817 = 207518
Step 255: 207518 + 817 = 208335
Step 256: 208335 + 817 = 209152
Step 257: 209152 + 817 = 209969
Step 258: 209969 + 817 = 210786
Step 259: 210786 + 817 = 211603
Step 260: 211603 + 817 = 212420
Step 261: 212420 + 817 = 213237
Step 262: 213237 + 817 = 214054
Step 263: 214054 + 817 = 214871
Step 264: 214871 + 817 = 215688
Step 265: 215688 + 817 = 216505
Step 266: 216505 + 817 = 217322
Step 267: 217322 + 817 = 218139
Step 268: 218139 + 817 = 218956
Step 269: 218956 + 817 = 219773
Step 270: 219773 + 817 = 220590
Step 271: 220590 + 817 = 221407
Step 272: 221407 + 817 = 222224
Step 273: 222224 + 817 = 223041
Step 274: 223041 + 817 = 223858
Step 275: 223858 + 817 = 224675
Step 276: 224675 + 817 = 225492
Step 277: 225492 + 817 = 226309
Step 278: 226309 + 817 = 227126
Step 279: 227126 + 817 = 227943
Step 280: 227943 + 817 = 228760
Step 281: 228760 + 817 = 229577
Step 282: 229577 + 817 = 230394
Step 283: 230394 + 817 = 231211
Step 284: 231211 + 817 = 232028
Step 285: 232028 + 817 = 232845
Step 286: 232845 + 817 = 233662
Step 287: 233662 + 817 = 234479
Step 288: 234479 + 817 = 235296
Step 289: 235296 + 817 = 236113
Step 290: 236113 + 817 = 236930
Step 291: 236930 + 817 = 237747
Step 292: 237747 + 817 = 238564
Step 293: 238564 + 817 = 239381
Step 294: 239381 + 817 = 240198
Step 295: 240198 + 817 = 241015
Step 296: 241015 + 817 = 241832
Step 297: 241832 + 817 = 242649
Step 298: 242649 + 817 = 243466
Step 299: 243466 + 817 = 244283
Step 300: 244283 + 817 = 245100
Step 301: 245100 + 817 = 245917
Step 302: 245917 + 817 = 246734
Step 303: 246734 + 817 = 247551
Step 304: 247551 + 817 = 248368
Step 305: 248368 + 817 = 249185
Step 306: 249185 + 817 = 250002
Step 307: 250002 + 817 = 250819
Step 308: 250819 + 817 = 251636
Step 309: 251636 + 817 = 252453
Step 310: 252453 + 817 = 253270
Step 311: 253270 + 817 = 254087
Step 312: 254087 + 817 = 254904
Step 313: 254904 + 817 = 255721
Step 314: 255721 + 817 = 256538
Step 315: 256538 + 817 = 257355
Step 316: 257355 + 817 = 258172
Step 317: 258172 + 817 = 258989
Step 318: 258989 + 817 = 259806
Step 319: 259806 + 817 = 260623
Step 320: 260623 + 817 = 261440
Step 321: 261440 + 817 = 262257
Step 322: 262257 + 817 = 263074
Step 323: 263074 + 817 = 263891
Step 324: 263891 + 817 = 264708
Step 325: 264708 + 817 = 265525
Step 326: 265525 + 817 = 266342
Step 327: 266342 + 817 = 267159
Step 328: 267159 + 817 = 267976
Step 329: 267976 + 817 = 268793
Step 330: 268793 + 817 = 269610
Step 331: 269610 + 817 = 270427
Step 332: 270427 + 817 = 271244
Step 333: 271244 + 817 = 272061
Step 334: 272061 + 817 = 272878
Step 335: 272878 + 817 = 273695
Step 336: 273695 + 817 = 274512
Step 337: 274512 + 817 = 275329
Step 338: 275329 + 817 = 276146
Step 339: 276146 + 817 = 276963
Step 340: 276963 + 817 = 277780
Step 341: 277780 + 817 = 278597
Step 342: 278597 + 817 = 279414
Step 343: 279414 + 817 = 280231
Step 344: 280231 + 817 = 281048
Step 345: 281048 + 817 = 281865
Step 346: 281865 + 817 = 282682
Step 347: 282682 + 817 = 283499
Step 348: 283499 + 817 = 284316
Step 349: 284316 + 817 = 285133
Step 350: 285133 + 817 = 285950
Step 351: 285950 + 817 = 286767
Step 352: 286767 + 817 = 287584
Step 353: 287584 + 817 = 288401
Step 354: 288401 + 817 = 289218
Step 355: 289218 + 817 = 290035
Step 356: 290035 + 817 = 290852
Step 357: 290852 + 817 = 291669
Step 358: 291669 + 817 = 292486
Step 359: 292486 + 817 = 293303
Step 360: 293303 + 817 = 294120
Step 361: 294120 + 817 = 294937
Step 362: 294937 + 817 = 295754
Step 363: 295754 + 817 = 296571
Step 364: 296571 + 817 = 297388
Step 365: 297388 + 817 = 298205
Step 366: 298205 + 817 = 299022
Step 367: 299022 + 817 = 299839
Step 368: 299839 + 817 = 300656
Step 369: 300656 + 817 = 301473
Step 370: 301473 + 817 = 302290
Step 371: 302290 + 817 = 303107
Step 372: 303107 + 817 = 303924
Step 373: 303924 + 817 = 304741
Step 374: 304741 + 817 = 305558
Step 375: 305558 + 817 = 306375
Step 376: 306375 + 817 = 307192
Step 377: 307192 + 817 = 308009
Step 378: 308009 + 817 = 308826
Step 379: 308826 + 817 = 309643
Step 380: 309643 + 817 = 310460
Step 381: 310460 + 817 = 311277
Step 382: 311277 + 817 = 312094
Step 383: 312094 + 817 = 312911
Step 384: 312911 + 817 = 313728
Step 385: 313728 + 817 = 314545
Step 386: 314545 + 817 = 315362
Step 387: 315362 + 817 = 316179
Step 388: 316179 + 817 = 316996
Step 389: 316996 + 817 = 317813
Step 390: 317813 + 817 = 318630
Step 391: 318630 + 817 = 319447
Step 392: 319447 + 817 = 320264
Step 393: 320264 + 817 = 321081
Step 394: 321081 + 817 = 321898
Step 395: 321898 + 817 = 322715
Step 396: 322715 + 817 = 323532
Step 397: 323532 + 817 = 324349
Step 398: 324349 + 817 = 325166
Step 399: 325166 + 817 = 325983
Step 400: 325983 + 817 = 326800
Step 401: 326800 + 817 = 327617
Step 402: 327617 + 817 = 328434
Step 403: 328434 + 817 = 329251
Step 404: 329251 + 817 = 330068
Step 405: 330068 + 817 = 330885
Step 406: 330885 + 817 = 331702
Step 407: 331702 + 817 = 332519
Step 408: 332519 + 817 = 333336
Step 409: 333336 + 817 = 334153
Step 410: 334153 + 817 = 334970
Step 411: 334970 + 817 = 335787
Step 412: 335787 + 817 = 336604
Step 413: 336604 + 817 = 337421
Step 414: 337421 + 817 = 338238
Step 415: 338238 + 817 = 339055
Step 416: 339055 + 817 = 339872
Step 417: 339872 + 817 = 340689
Step 418: 340689 + 817 = 341506
Step 419: 341506 + 817 = 342323
Step 420: 342323 + 817 = 343140
Step 421: 343140 + 817 = 343957
Step 422: 343957 + 817 = 344774
Step 423: 344774 + 817 = 345591
Step 424: 345591 + 817 = 346408
Step 425: 346408 + 817 = 347225
Step 426: 347225 + 817 = 348042
Step 427: 348042 + 817 = 348859
Step 428: 348859 + 817 = 349676
Step 429: 349676 + 817 = 350493
Step 430: 350493 + 817 = 351310
Step 431: 351310 + 817 = 352127
Step 432: 352127 + 817 = 352944
Step 433: 352944 + 817 = 353761
Step 434: 353761 + 817 = 354578
Step 435: 354578 + 817 = 355395
Step 436: 355395 + 817 = 356212
Step 437: 356212 + 817 = 357029
Step 438: 357029 + 817 = 357846
Step 439: 357846 + 817 = 358663
Step 440: 358663 + 817 = 359480
Step 441: 359480 + 817 = 360297
Step 442: 360297 + 817 = 361114
Step 443: 361114 + 817 = 361931
Step 444: 361931 + 817 = 362748
Step 445: 362748 + 817 = 363565
Step 446: 363565 + 817 = 364382
Step 447: 364382 + 817 = 365199
Step 448: 365199 + 817 = 366016
Step 449: 366016 + 817 = 366833
Step 450: 366833 + 817 = 367650
Step 451: 367650 + 817 = 368467
Step 452: 368467 + 817 = 369284
Step 453: 369284 + 817 = 370101
Step 454: 370101 + 817 = 370918
Step 455: 370918 + 817 = 371735

So, 817*455 = 371735