OK, let's crack this. We're given 873 and our task is to multiply it by 477. Essentially, we'll be adding 873 to itself 477 times.
Step 1: 0 + 873 = 873
Step 2: 873 + 873 = 1746
Step 3: 1746 + 873 = 2619
Step 4: 2619 + 873 = 3492
Step 5: 3492 + 873 = 4365
Step 6: 4365 + 873 = 5238
Step 7: 5238 + 873 = 6111
Step 8: 6111 + 873 = 6984
Step 9: 6984 + 873 = 7857
Step 10: 7857 + 873 = 8730
Step 11: 8730 + 873 = 9603
Step 12: 9603 + 873 = 10476
Step 13: 10476 + 873 = 11349
Step 14: 11349 + 873 = 12222
Step 15: 12222 + 873 = 13095
Step 16: 13095 + 873 = 13968
Step 17: 13968 + 873 = 14841
Step 18: 14841 + 873 = 15714
Step 19: 15714 + 873 = 16587
Step 20: 16587 + 873 = 17460
Step 21: 17460 + 873 = 18333
Step 22: 18333 + 873 = 19206
Step 23: 19206 + 873 = 20079
Step 24: 20079 + 873 = 20952
Step 25: 20952 + 873 = 21825
Step 26: 21825 + 873 = 22698
Step 27: 22698 + 873 = 23571
Step 28: 23571 + 873 = 24444
Step 29: 24444 + 873 = 25317
Step 30: 25317 + 873 = 26190
Step 31: 26190 + 873 = 27063
Step 32: 27063 + 873 = 27936
Step 33: 27936 + 873 = 28809
Step 34: 28809 + 873 = 29682
Step 35: 29682 + 873 = 30555
Step 36: 30555 + 873 = 31428
Step 37: 31428 + 873 = 32301
Step 38: 32301 + 873 = 33174
Step 39: 33174 + 873 = 34047
Step 40: 34047 + 873 = 34920
Step 41: 34920 + 873 = 35793
Step 42: 35793 + 873 = 36666
Step 43: 36666 + 873 = 37539
Step 44: 37539 + 873 = 38412
Step 45: 38412 + 873 = 39285
Step 46: 39285 + 873 = 40158
Step 47: 40158 + 873 = 41031
Step 48: 41031 + 873 = 41904
Step 49: 41904 + 873 = 42777
Step 50: 42777 + 873 = 43650
Step 51: 43650 + 873 = 44523
Step 52: 44523 + 873 = 45396
Step 53: 45396 + 873 = 46269
Step 54: 46269 + 873 = 47142
Step 55: 47142 + 873 = 48015
Step 56: 48015 + 873 = 48888
Step 57: 48888 + 873 = 49761
Step 58: 49761 + 873 = 50634
Step 59: 50634 + 873 = 51507
Step 60: 51507 + 873 = 52380
Step 61: 52380 + 873 = 53253
Step 62: 53253 + 873 = 54126
Step 63: 54126 + 873 = 54999
Step 64: 54999 + 873 = 55872
Step 65: 55872 + 873 = 56745
Step 66: 56745 + 873 = 57618
Step 67: 57618 + 873 = 58491
Step 68: 58491 + 873 = 59364
Step 69: 59364 + 873 = 60237
Step 70: 60237 + 873 = 61110
Step 71: 61110 + 873 = 61983
Step 72: 61983 + 873 = 62856
Step 73: 62856 + 873 = 63729
Step 74: 63729 + 873 = 64602
Step 75: 64602 + 873 = 65475
Step 76: 65475 + 873 = 66348
Step 77: 66348 + 873 = 67221
Step 78: 67221 + 873 = 68094
Step 79: 68094 + 873 = 68967
Step 80: 68967 + 873 = 69840
Step 81: 69840 + 873 = 70713
Step 82: 70713 + 873 = 71586
Step 83: 71586 + 873 = 72459
Step 84: 72459 + 873 = 73332
Step 85: 73332 + 873 = 74205
Step 86: 74205 + 873 = 75078
Step 87: 75078 + 873 = 75951
Step 88: 75951 + 873 = 76824
Step 89: 76824 + 873 = 77697
Step 90: 77697 + 873 = 78570
Step 91: 78570 + 873 = 79443
Step 92: 79443 + 873 = 80316
Step 93: 80316 + 873 = 81189
Step 94: 81189 + 873 = 82062
Step 95: 82062 + 873 = 82935
Step 96: 82935 + 873 = 83808
Step 97: 83808 + 873 = 84681
Step 98: 84681 + 873 = 85554
Step 99: 85554 + 873 = 86427
Step 100: 86427 + 873 = 87300
Step 101: 87300 + 873 = 88173
Step 102: 88173 + 873 = 89046
Step 103: 89046 + 873 = 89919
Step 104: 89919 + 873 = 90792
Step 105: 90792 + 873 = 91665
Step 106: 91665 + 873 = 92538
Step 107: 92538 + 873 = 93411
Step 108: 93411 + 873 = 94284
Step 109: 94284 + 873 = 95157
Step 110: 95157 + 873 = 96030
Step 111: 96030 + 873 = 96903
Step 112: 96903 + 873 = 97776
Step 113: 97776 + 873 = 98649
Step 114: 98649 + 873 = 99522
Step 115: 99522 + 873 = 100395
Step 116: 100395 + 873 = 101268
Step 117: 101268 + 873 = 102141
Step 118: 102141 + 873 = 103014
Step 119: 103014 + 873 = 103887
Step 120: 103887 + 873 = 104760
Step 121: 104760 + 873 = 105633
Step 122: 105633 + 873 = 106506
Step 123: 106506 + 873 = 107379
Step 124: 107379 + 873 = 108252
Step 125: 108252 + 873 = 109125
Step 126: 109125 + 873 = 109998
Step 127: 109998 + 873 = 110871
Step 128: 110871 + 873 = 111744
Step 129: 111744 + 873 = 112617
Step 130: 112617 + 873 = 113490
Step 131: 113490 + 873 = 114363
Step 132: 114363 + 873 = 115236
Step 133: 115236 + 873 = 116109
Step 134: 116109 + 873 = 116982
Step 135: 116982 + 873 = 117855
Step 136: 117855 + 873 = 118728
Step 137: 118728 + 873 = 119601
Step 138: 119601 + 873 = 120474
Step 139: 120474 + 873 = 121347
Step 140: 121347 + 873 = 122220
Step 141: 122220 + 873 = 123093
Step 142: 123093 + 873 = 123966
Step 143: 123966 + 873 = 124839
Step 144: 124839 + 873 = 125712
Step 145: 125712 + 873 = 126585
Step 146: 126585 + 873 = 127458
Step 147: 127458 + 873 = 128331
Step 148: 128331 + 873 = 129204
Step 149: 129204 + 873 = 130077
Step 150: 130077 + 873 = 130950
Step 151: 130950 + 873 = 131823
Step 152: 131823 + 873 = 132696
Step 153: 132696 + 873 = 133569
Step 154: 133569 + 873 = 134442
Step 155: 134442 + 873 = 135315
Step 156: 135315 + 873 = 136188
Step 157: 136188 + 873 = 137061
Step 158: 137061 + 873 = 137934
Step 159: 137934 + 873 = 138807
Step 160: 138807 + 873 = 139680
Step 161: 139680 + 873 = 140553
Step 162: 140553 + 873 = 141426
Step 163: 141426 + 873 = 142299
Step 164: 142299 + 873 = 143172
Step 165: 143172 + 873 = 144045
Step 166: 144045 + 873 = 144918
Step 167: 144918 + 873 = 145791
Step 168: 145791 + 873 = 146664
Step 169: 146664 + 873 = 147537
Step 170: 147537 + 873 = 148410
Step 171: 148410 + 873 = 149283
Step 172: 149283 + 873 = 150156
Step 173: 150156 + 873 = 151029
Step 174: 151029 + 873 = 151902
Step 175: 151902 + 873 = 152775
Step 176: 152775 + 873 = 153648
Step 177: 153648 + 873 = 154521
Step 178: 154521 + 873 = 155394
Step 179: 155394 + 873 = 156267
Step 180: 156267 + 873 = 157140
Step 181: 157140 + 873 = 158013
Step 182: 158013 + 873 = 158886
Step 183: 158886 + 873 = 159759
Step 184: 159759 + 873 = 160632
Step 185: 160632 + 873 = 161505
Step 186: 161505 + 873 = 162378
Step 187: 162378 + 873 = 163251
Step 188: 163251 + 873 = 164124
Step 189: 164124 + 873 = 164997
Step 190: 164997 + 873 = 165870
Step 191: 165870 + 873 = 166743
Step 192: 166743 + 873 = 167616
Step 193: 167616 + 873 = 168489
Step 194: 168489 + 873 = 169362
Step 195: 169362 + 873 = 170235
Step 196: 170235 + 873 = 171108
Step 197: 171108 + 873 = 171981
Step 198: 171981 + 873 = 172854
Step 199: 172854 + 873 = 173727
Step 200: 173727 + 873 = 174600
Step 201: 174600 + 873 = 175473
Step 202: 175473 + 873 = 176346
Step 203: 176346 + 873 = 177219
Step 204: 177219 + 873 = 178092
Step 205: 178092 + 873 = 178965
Step 206: 178965 + 873 = 179838
Step 207: 179838 + 873 = 180711
Step 208: 180711 + 873 = 181584
Step 209: 181584 + 873 = 182457
Step 210: 182457 + 873 = 183330
Step 211: 183330 + 873 = 184203
Step 212: 184203 + 873 = 185076
Step 213: 185076 + 873 = 185949
Step 214: 185949 + 873 = 186822
Step 215: 186822 + 873 = 187695
Step 216: 187695 + 873 = 188568
Step 217: 188568 + 873 = 189441
Step 218: 189441 + 873 = 190314
Step 219: 190314 + 873 = 191187
Step 220: 191187 + 873 = 192060
Step 221: 192060 + 873 = 192933
Step 222: 192933 + 873 = 193806
Step 223: 193806 + 873 = 194679
Step 224: 194679 + 873 = 195552
Step 225: 195552 + 873 = 196425
Step 226: 196425 + 873 = 197298
Step 227: 197298 + 873 = 198171
Step 228: 198171 + 873 = 199044
Step 229: 199044 + 873 = 199917
Step 230: 199917 + 873 = 200790
Step 231: 200790 + 873 = 201663
Step 232: 201663 + 873 = 202536
Step 233: 202536 + 873 = 203409
Step 234: 203409 + 873 = 204282
Step 235: 204282 + 873 = 205155
Step 236: 205155 + 873 = 206028
Step 237: 206028 + 873 = 206901
Step 238: 206901 + 873 = 207774
Step 239: 207774 + 873 = 208647
Step 240: 208647 + 873 = 209520
Step 241: 209520 + 873 = 210393
Step 242: 210393 + 873 = 211266
Step 243: 211266 + 873 = 212139
Step 244: 212139 + 873 = 213012
Step 245: 213012 + 873 = 213885
Step 246: 213885 + 873 = 214758
Step 247: 214758 + 873 = 215631
Step 248: 215631 + 873 = 216504
Step 249: 216504 + 873 = 217377
Step 250: 217377 + 873 = 218250
Step 251: 218250 + 873 = 219123
Step 252: 219123 + 873 = 219996
Step 253: 219996 + 873 = 220869
Step 254: 220869 + 873 = 221742
Step 255: 221742 + 873 = 222615
Step 256: 222615 + 873 = 223488
Step 257: 223488 + 873 = 224361
Step 258: 224361 + 873 = 225234
Step 259: 225234 + 873 = 226107
Step 260: 226107 + 873 = 226980
Step 261: 226980 + 873 = 227853
Step 262: 227853 + 873 = 228726
Step 263: 228726 + 873 = 229599
Step 264: 229599 + 873 = 230472
Step 265: 230472 + 873 = 231345
Step 266: 231345 + 873 = 232218
Step 267: 232218 + 873 = 233091
Step 268: 233091 + 873 = 233964
Step 269: 233964 + 873 = 234837
Step 270: 234837 + 873 = 235710
Step 271: 235710 + 873 = 236583
Step 272: 236583 + 873 = 237456
Step 273: 237456 + 873 = 238329
Step 274: 238329 + 873 = 239202
Step 275: 239202 + 873 = 240075
Step 276: 240075 + 873 = 240948
Step 277: 240948 + 873 = 241821
Step 278: 241821 + 873 = 242694
Step 279: 242694 + 873 = 243567
Step 280: 243567 + 873 = 244440
Step 281: 244440 + 873 = 245313
Step 282: 245313 + 873 = 246186
Step 283: 246186 + 873 = 247059
Step 284: 247059 + 873 = 247932
Step 285: 247932 + 873 = 248805
Step 286: 248805 + 873 = 249678
Step 287: 249678 + 873 = 250551
Step 288: 250551 + 873 = 251424
Step 289: 251424 + 873 = 252297
Step 290: 252297 + 873 = 253170
Step 291: 253170 + 873 = 254043
Step 292: 254043 + 873 = 254916
Step 293: 254916 + 873 = 255789
Step 294: 255789 + 873 = 256662
Step 295: 256662 + 873 = 257535
Step 296: 257535 + 873 = 258408
Step 297: 258408 + 873 = 259281
Step 298: 259281 + 873 = 260154
Step 299: 260154 + 873 = 261027
Step 300: 261027 + 873 = 261900
Step 301: 261900 + 873 = 262773
Step 302: 262773 + 873 = 263646
Step 303: 263646 + 873 = 264519
Step 304: 264519 + 873 = 265392
Step 305: 265392 + 873 = 266265
Step 306: 266265 + 873 = 267138
Step 307: 267138 + 873 = 268011
Step 308: 268011 + 873 = 268884
Step 309: 268884 + 873 = 269757
Step 310: 269757 + 873 = 270630
Step 311: 270630 + 873 = 271503
Step 312: 271503 + 873 = 272376
Step 313: 272376 + 873 = 273249
Step 314: 273249 + 873 = 274122
Step 315: 274122 + 873 = 274995
Step 316: 274995 + 873 = 275868
Step 317: 275868 + 873 = 276741
Step 318: 276741 + 873 = 277614
Step 319: 277614 + 873 = 278487
Step 320: 278487 + 873 = 279360
Step 321: 279360 + 873 = 280233
Step 322: 280233 + 873 = 281106
Step 323: 281106 + 873 = 281979
Step 324: 281979 + 873 = 282852
Step 325: 282852 + 873 = 283725
Step 326: 283725 + 873 = 284598
Step 327: 284598 + 873 = 285471
Step 328: 285471 + 873 = 286344
Step 329: 286344 + 873 = 287217
Step 330: 287217 + 873 = 288090
Step 331: 288090 + 873 = 288963
Step 332: 288963 + 873 = 289836
Step 333: 289836 + 873 = 290709
Step 334: 290709 + 873 = 291582
Step 335: 291582 + 873 = 292455
Step 336: 292455 + 873 = 293328
Step 337: 293328 + 873 = 294201
Step 338: 294201 + 873 = 295074
Step 339: 295074 + 873 = 295947
Step 340: 295947 + 873 = 296820
Step 341: 296820 + 873 = 297693
Step 342: 297693 + 873 = 298566
Step 343: 298566 + 873 = 299439
Step 344: 299439 + 873 = 300312
Step 345: 300312 + 873 = 301185
Step 346: 301185 + 873 = 302058
Step 347: 302058 + 873 = 302931
Step 348: 302931 + 873 = 303804
Step 349: 303804 + 873 = 304677
Step 350: 304677 + 873 = 305550
Step 351: 305550 + 873 = 306423
Step 352: 306423 + 873 = 307296
Step 353: 307296 + 873 = 308169
Step 354: 308169 + 873 = 309042
Step 355: 309042 + 873 = 309915
Step 356: 309915 + 873 = 310788
Step 357: 310788 + 873 = 311661
Step 358: 311661 + 873 = 312534
Step 359: 312534 + 873 = 313407
Step 360: 313407 + 873 = 314280
Step 361: 314280 + 873 = 315153
Step 362: 315153 + 873 = 316026
Step 363: 316026 + 873 = 316899
Step 364: 316899 + 873 = 317772
Step 365: 317772 + 873 = 318645
Step 366: 318645 + 873 = 319518
Step 367: 319518 + 873 = 320391
Step 368: 320391 + 873 = 321264
Step 369: 321264 + 873 = 322137
Step 370: 322137 + 873 = 323010
Step 371: 323010 + 873 = 323883
Step 372: 323883 + 873 = 324756
Step 373: 324756 + 873 = 325629
Step 374: 325629 + 873 = 326502
Step 375: 326502 + 873 = 327375
Step 376: 327375 + 873 = 328248
Step 377: 328248 + 873 = 329121
Step 378: 329121 + 873 = 329994
Step 379: 329994 + 873 = 330867
Step 380: 330867 + 873 = 331740
Step 381: 331740 + 873 = 332613
Step 382: 332613 + 873 = 333486
Step 383: 333486 + 873 = 334359
Step 384: 334359 + 873 = 335232
Step 385: 335232 + 873 = 336105
Step 386: 336105 + 873 = 336978
Step 387: 336978 + 873 = 337851
Step 388: 337851 + 873 = 338724
Step 389: 338724 + 873 = 339597
Step 390: 339597 + 873 = 340470
Step 391: 340470 + 873 = 341343
Step 392: 341343 + 873 = 342216
Step 393: 342216 + 873 = 343089
Step 394: 343089 + 873 = 343962
Step 395: 343962 + 873 = 344835
Step 396: 344835 + 873 = 345708
Step 397: 345708 + 873 = 346581
Step 398: 346581 + 873 = 347454
Step 399: 347454 + 873 = 348327
Step 400: 348327 + 873 = 349200
Step 401: 349200 + 873 = 350073
Step 402: 350073 + 873 = 350946
Step 403: 350946 + 873 = 351819
Step 404: 351819 + 873 = 352692
Step 405: 352692 + 873 = 353565
Step 406: 353565 + 873 = 354438
Step 407: 354438 + 873 = 355311
Step 408: 355311 + 873 = 356184
Step 409: 356184 + 873 = 357057
Step 410: 357057 + 873 = 357930
Step 411: 357930 + 873 = 358803
Step 412: 358803 + 873 = 359676
Step 413: 359676 + 873 = 360549
Step 414: 360549 + 873 = 361422
Step 415: 361422 + 873 = 362295
Step 416: 362295 + 873 = 363168
Step 417: 363168 + 873 = 364041
Step 418: 364041 + 873 = 364914
Step 419: 364914 + 873 = 365787
Step 420: 365787 + 873 = 366660
Step 421: 366660 + 873 = 367533
Step 422: 367533 + 873 = 368406
Step 423: 368406 + 873 = 369279
Step 424: 369279 + 873 = 370152
Step 425: 370152 + 873 = 371025
Step 426: 371025 + 873 = 371898
Step 427: 371898 + 873 = 372771
Step 428: 372771 + 873 = 373644
Step 429: 373644 + 873 = 374517
Step 430: 374517 + 873 = 375390
Step 431: 375390 + 873 = 376263
Step 432: 376263 + 873 = 377136
Step 433: 377136 + 873 = 378009
Step 434: 378009 + 873 = 378882
Step 435: 378882 + 873 = 379755
Step 436: 379755 + 873 = 380628
Step 437: 380628 + 873 = 381501
Step 438: 381501 + 873 = 382374
Step 439: 382374 + 873 = 383247
Step 440: 383247 + 873 = 384120
Step 441: 384120 + 873 = 384993
Step 442: 384993 + 873 = 385866
Step 443: 385866 + 873 = 386739
Step 444: 386739 + 873 = 387612
Step 445: 387612 + 873 = 388485
Step 446: 388485 + 873 = 389358
Step 447: 389358 + 873 = 390231
Step 448: 390231 + 873 = 391104
Step 449: 391104 + 873 = 391977
Step 450: 391977 + 873 = 392850
Step 451: 392850 + 873 = 393723
Step 452: 393723 + 873 = 394596
Step 453: 394596 + 873 = 395469
Step 454: 395469 + 873 = 396342
Step 455: 396342 + 873 = 397215
Step 456: 397215 + 873 = 398088
Step 457: 398088 + 873 = 398961
Step 458: 398961 + 873 = 399834
Step 459: 399834 + 873 = 400707
Step 460: 400707 + 873 = 401580
Step 461: 401580 + 873 = 402453
Step 462: 402453 + 873 = 403326
Step 463: 403326 + 873 = 404199
Step 464: 404199 + 873 = 405072
Step 465: 405072 + 873 = 405945
Step 466: 405945 + 873 = 406818
Step 467: 406818 + 873 = 407691
Step 468: 407691 + 873 = 408564
Step 469: 408564 + 873 = 409437
Step 470: 409437 + 873 = 410310
Step 471: 410310 + 873 = 411183
Step 472: 411183 + 873 = 412056
Step 473: 412056 + 873 = 412929
Step 474: 412929 + 873 = 413802
Step 475: 413802 + 873 = 414675
Step 476: 414675 + 873 = 415548
Step 477: 415548 + 873 = 416421

So, 873*477 = 416421