OK, let's work through this together. We're starting with 923 and we're going to multiply it by 404, which means we add 923 to itself 404 times.
Step 1: 0 + 923 = 923
Step 2: 923 + 923 = 1846
Step 3: 1846 + 923 = 2769
Step 4: 2769 + 923 = 3692
Step 5: 3692 + 923 = 4615
Step 6: 4615 + 923 = 5538
Step 7: 5538 + 923 = 6461
Step 8: 6461 + 923 = 7384
Step 9: 7384 + 923 = 8307
Step 10: 8307 + 923 = 9230
Step 11: 9230 + 923 = 10153
Step 12: 10153 + 923 = 11076
Step 13: 11076 + 923 = 11999
Step 14: 11999 + 923 = 12922
Step 15: 12922 + 923 = 13845
Step 16: 13845 + 923 = 14768
Step 17: 14768 + 923 = 15691
Step 18: 15691 + 923 = 16614
Step 19: 16614 + 923 = 17537
Step 20: 17537 + 923 = 18460
Step 21: 18460 + 923 = 19383
Step 22: 19383 + 923 = 20306
Step 23: 20306 + 923 = 21229
Step 24: 21229 + 923 = 22152
Step 25: 22152 + 923 = 23075
Step 26: 23075 + 923 = 23998
Step 27: 23998 + 923 = 24921
Step 28: 24921 + 923 = 25844
Step 29: 25844 + 923 = 26767
Step 30: 26767 + 923 = 27690
Step 31: 27690 + 923 = 28613
Step 32: 28613 + 923 = 29536
Step 33: 29536 + 923 = 30459
Step 34: 30459 + 923 = 31382
Step 35: 31382 + 923 = 32305
Step 36: 32305 + 923 = 33228
Step 37: 33228 + 923 = 34151
Step 38: 34151 + 923 = 35074
Step 39: 35074 + 923 = 35997
Step 40: 35997 + 923 = 36920
Step 41: 36920 + 923 = 37843
Step 42: 37843 + 923 = 38766
Step 43: 38766 + 923 = 39689
Step 44: 39689 + 923 = 40612
Step 45: 40612 + 923 = 41535
Step 46: 41535 + 923 = 42458
Step 47: 42458 + 923 = 43381
Step 48: 43381 + 923 = 44304
Step 49: 44304 + 923 = 45227
Step 50: 45227 + 923 = 46150
Step 51: 46150 + 923 = 47073
Step 52: 47073 + 923 = 47996
Step 53: 47996 + 923 = 48919
Step 54: 48919 + 923 = 49842
Step 55: 49842 + 923 = 50765
Step 56: 50765 + 923 = 51688
Step 57: 51688 + 923 = 52611
Step 58: 52611 + 923 = 53534
Step 59: 53534 + 923 = 54457
Step 60: 54457 + 923 = 55380
Step 61: 55380 + 923 = 56303
Step 62: 56303 + 923 = 57226
Step 63: 57226 + 923 = 58149
Step 64: 58149 + 923 = 59072
Step 65: 59072 + 923 = 59995
Step 66: 59995 + 923 = 60918
Step 67: 60918 + 923 = 61841
Step 68: 61841 + 923 = 62764
Step 69: 62764 + 923 = 63687
Step 70: 63687 + 923 = 64610
Step 71: 64610 + 923 = 65533
Step 72: 65533 + 923 = 66456
Step 73: 66456 + 923 = 67379
Step 74: 67379 + 923 = 68302
Step 75: 68302 + 923 = 69225
Step 76: 69225 + 923 = 70148
Step 77: 70148 + 923 = 71071
Step 78: 71071 + 923 = 71994
Step 79: 71994 + 923 = 72917
Step 80: 72917 + 923 = 73840
Step 81: 73840 + 923 = 74763
Step 82: 74763 + 923 = 75686
Step 83: 75686 + 923 = 76609
Step 84: 76609 + 923 = 77532
Step 85: 77532 + 923 = 78455
Step 86: 78455 + 923 = 79378
Step 87: 79378 + 923 = 80301
Step 88: 80301 + 923 = 81224
Step 89: 81224 + 923 = 82147
Step 90: 82147 + 923 = 83070
Step 91: 83070 + 923 = 83993
Step 92: 83993 + 923 = 84916
Step 93: 84916 + 923 = 85839
Step 94: 85839 + 923 = 86762
Step 95: 86762 + 923 = 87685
Step 96: 87685 + 923 = 88608
Step 97: 88608 + 923 = 89531
Step 98: 89531 + 923 = 90454
Step 99: 90454 + 923 = 91377
Step 100: 91377 + 923 = 92300
Step 101: 92300 + 923 = 93223
Step 102: 93223 + 923 = 94146
Step 103: 94146 + 923 = 95069
Step 104: 95069 + 923 = 95992
Step 105: 95992 + 923 = 96915
Step 106: 96915 + 923 = 97838
Step 107: 97838 + 923 = 98761
Step 108: 98761 + 923 = 99684
Step 109: 99684 + 923 = 100607
Step 110: 100607 + 923 = 101530
Step 111: 101530 + 923 = 102453
Step 112: 102453 + 923 = 103376
Step 113: 103376 + 923 = 104299
Step 114: 104299 + 923 = 105222
Step 115: 105222 + 923 = 106145
Step 116: 106145 + 923 = 107068
Step 117: 107068 + 923 = 107991
Step 118: 107991 + 923 = 108914
Step 119: 108914 + 923 = 109837
Step 120: 109837 + 923 = 110760
Step 121: 110760 + 923 = 111683
Step 122: 111683 + 923 = 112606
Step 123: 112606 + 923 = 113529
Step 124: 113529 + 923 = 114452
Step 125: 114452 + 923 = 115375
Step 126: 115375 + 923 = 116298
Step 127: 116298 + 923 = 117221
Step 128: 117221 + 923 = 118144
Step 129: 118144 + 923 = 119067
Step 130: 119067 + 923 = 119990
Step 131: 119990 + 923 = 120913
Step 132: 120913 + 923 = 121836
Step 133: 121836 + 923 = 122759
Step 134: 122759 + 923 = 123682
Step 135: 123682 + 923 = 124605
Step 136: 124605 + 923 = 125528
Step 137: 125528 + 923 = 126451
Step 138: 126451 + 923 = 127374
Step 139: 127374 + 923 = 128297
Step 140: 128297 + 923 = 129220
Step 141: 129220 + 923 = 130143
Step 142: 130143 + 923 = 131066
Step 143: 131066 + 923 = 131989
Step 144: 131989 + 923 = 132912
Step 145: 132912 + 923 = 133835
Step 146: 133835 + 923 = 134758
Step 147: 134758 + 923 = 135681
Step 148: 135681 + 923 = 136604
Step 149: 136604 + 923 = 137527
Step 150: 137527 + 923 = 138450
Step 151: 138450 + 923 = 139373
Step 152: 139373 + 923 = 140296
Step 153: 140296 + 923 = 141219
Step 154: 141219 + 923 = 142142
Step 155: 142142 + 923 = 143065
Step 156: 143065 + 923 = 143988
Step 157: 143988 + 923 = 144911
Step 158: 144911 + 923 = 145834
Step 159: 145834 + 923 = 146757
Step 160: 146757 + 923 = 147680
Step 161: 147680 + 923 = 148603
Step 162: 148603 + 923 = 149526
Step 163: 149526 + 923 = 150449
Step 164: 150449 + 923 = 151372
Step 165: 151372 + 923 = 152295
Step 166: 152295 + 923 = 153218
Step 167: 153218 + 923 = 154141
Step 168: 154141 + 923 = 155064
Step 169: 155064 + 923 = 155987
Step 170: 155987 + 923 = 156910
Step 171: 156910 + 923 = 157833
Step 172: 157833 + 923 = 158756
Step 173: 158756 + 923 = 159679
Step 174: 159679 + 923 = 160602
Step 175: 160602 + 923 = 161525
Step 176: 161525 + 923 = 162448
Step 177: 162448 + 923 = 163371
Step 178: 163371 + 923 = 164294
Step 179: 164294 + 923 = 165217
Step 180: 165217 + 923 = 166140
Step 181: 166140 + 923 = 167063
Step 182: 167063 + 923 = 167986
Step 183: 167986 + 923 = 168909
Step 184: 168909 + 923 = 169832
Step 185: 169832 + 923 = 170755
Step 186: 170755 + 923 = 171678
Step 187: 171678 + 923 = 172601
Step 188: 172601 + 923 = 173524
Step 189: 173524 + 923 = 174447
Step 190: 174447 + 923 = 175370
Step 191: 175370 + 923 = 176293
Step 192: 176293 + 923 = 177216
Step 193: 177216 + 923 = 178139
Step 194: 178139 + 923 = 179062
Step 195: 179062 + 923 = 179985
Step 196: 179985 + 923 = 180908
Step 197: 180908 + 923 = 181831
Step 198: 181831 + 923 = 182754
Step 199: 182754 + 923 = 183677
Step 200: 183677 + 923 = 184600
Step 201: 184600 + 923 = 185523
Step 202: 185523 + 923 = 186446
Step 203: 186446 + 923 = 187369
Step 204: 187369 + 923 = 188292
Step 205: 188292 + 923 = 189215
Step 206: 189215 + 923 = 190138
Step 207: 190138 + 923 = 191061
Step 208: 191061 + 923 = 191984
Step 209: 191984 + 923 = 192907
Step 210: 192907 + 923 = 193830
Step 211: 193830 + 923 = 194753
Step 212: 194753 + 923 = 195676
Step 213: 195676 + 923 = 196599
Step 214: 196599 + 923 = 197522
Step 215: 197522 + 923 = 198445
Step 216: 198445 + 923 = 199368
Step 217: 199368 + 923 = 200291
Step 218: 200291 + 923 = 201214
Step 219: 201214 + 923 = 202137
Step 220: 202137 + 923 = 203060
Step 221: 203060 + 923 = 203983
Step 222: 203983 + 923 = 204906
Step 223: 204906 + 923 = 205829
Step 224: 205829 + 923 = 206752
Step 225: 206752 + 923 = 207675
Step 226: 207675 + 923 = 208598
Step 227: 208598 + 923 = 209521
Step 228: 209521 + 923 = 210444
Step 229: 210444 + 923 = 211367
Step 230: 211367 + 923 = 212290
Step 231: 212290 + 923 = 213213
Step 232: 213213 + 923 = 214136
Step 233: 214136 + 923 = 215059
Step 234: 215059 + 923 = 215982
Step 235: 215982 + 923 = 216905
Step 236: 216905 + 923 = 217828
Step 237: 217828 + 923 = 218751
Step 238: 218751 + 923 = 219674
Step 239: 219674 + 923 = 220597
Step 240: 220597 + 923 = 221520
Step 241: 221520 + 923 = 222443
Step 242: 222443 + 923 = 223366
Step 243: 223366 + 923 = 224289
Step 244: 224289 + 923 = 225212
Step 245: 225212 + 923 = 226135
Step 246: 226135 + 923 = 227058
Step 247: 227058 + 923 = 227981
Step 248: 227981 + 923 = 228904
Step 249: 228904 + 923 = 229827
Step 250: 229827 + 923 = 230750
Step 251: 230750 + 923 = 231673
Step 252: 231673 + 923 = 232596
Step 253: 232596 + 923 = 233519
Step 254: 233519 + 923 = 234442
Step 255: 234442 + 923 = 235365
Step 256: 235365 + 923 = 236288
Step 257: 236288 + 923 = 237211
Step 258: 237211 + 923 = 238134
Step 259: 238134 + 923 = 239057
Step 260: 239057 + 923 = 239980
Step 261: 239980 + 923 = 240903
Step 262: 240903 + 923 = 241826
Step 263: 241826 + 923 = 242749
Step 264: 242749 + 923 = 243672
Step 265: 243672 + 923 = 244595
Step 266: 244595 + 923 = 245518
Step 267: 245518 + 923 = 246441
Step 268: 246441 + 923 = 247364
Step 269: 247364 + 923 = 248287
Step 270: 248287 + 923 = 249210
Step 271: 249210 + 923 = 250133
Step 272: 250133 + 923 = 251056
Step 273: 251056 + 923 = 251979
Step 274: 251979 + 923 = 252902
Step 275: 252902 + 923 = 253825
Step 276: 253825 + 923 = 254748
Step 277: 254748 + 923 = 255671
Step 278: 255671 + 923 = 256594
Step 279: 256594 + 923 = 257517
Step 280: 257517 + 923 = 258440
Step 281: 258440 + 923 = 259363
Step 282: 259363 + 923 = 260286
Step 283: 260286 + 923 = 261209
Step 284: 261209 + 923 = 262132
Step 285: 262132 + 923 = 263055
Step 286: 263055 + 923 = 263978
Step 287: 263978 + 923 = 264901
Step 288: 264901 + 923 = 265824
Step 289: 265824 + 923 = 266747
Step 290: 266747 + 923 = 267670
Step 291: 267670 + 923 = 268593
Step 292: 268593 + 923 = 269516
Step 293: 269516 + 923 = 270439
Step 294: 270439 + 923 = 271362
Step 295: 271362 + 923 = 272285
Step 296: 272285 + 923 = 273208
Step 297: 273208 + 923 = 274131
Step 298: 274131 + 923 = 275054
Step 299: 275054 + 923 = 275977
Step 300: 275977 + 923 = 276900
Step 301: 276900 + 923 = 277823
Step 302: 277823 + 923 = 278746
Step 303: 278746 + 923 = 279669
Step 304: 279669 + 923 = 280592
Step 305: 280592 + 923 = 281515
Step 306: 281515 + 923 = 282438
Step 307: 282438 + 923 = 283361
Step 308: 283361 + 923 = 284284
Step 309: 284284 + 923 = 285207
Step 310: 285207 + 923 = 286130
Step 311: 286130 + 923 = 287053
Step 312: 287053 + 923 = 287976
Step 313: 287976 + 923 = 288899
Step 314: 288899 + 923 = 289822
Step 315: 289822 + 923 = 290745
Step 316: 290745 + 923 = 291668
Step 317: 291668 + 923 = 292591
Step 318: 292591 + 923 = 293514
Step 319: 293514 + 923 = 294437
Step 320: 294437 + 923 = 295360
Step 321: 295360 + 923 = 296283
Step 322: 296283 + 923 = 297206
Step 323: 297206 + 923 = 298129
Step 324: 298129 + 923 = 299052
Step 325: 299052 + 923 = 299975
Step 326: 299975 + 923 = 300898
Step 327: 300898 + 923 = 301821
Step 328: 301821 + 923 = 302744
Step 329: 302744 + 923 = 303667
Step 330: 303667 + 923 = 304590
Step 331: 304590 + 923 = 305513
Step 332: 305513 + 923 = 306436
Step 333: 306436 + 923 = 307359
Step 334: 307359 + 923 = 308282
Step 335: 308282 + 923 = 309205
Step 336: 309205 + 923 = 310128
Step 337: 310128 + 923 = 311051
Step 338: 311051 + 923 = 311974
Step 339: 311974 + 923 = 312897
Step 340: 312897 + 923 = 313820
Step 341: 313820 + 923 = 314743
Step 342: 314743 + 923 = 315666
Step 343: 315666 + 923 = 316589
Step 344: 316589 + 923 = 317512
Step 345: 317512 + 923 = 318435
Step 346: 318435 + 923 = 319358
Step 347: 319358 + 923 = 320281
Step 348: 320281 + 923 = 321204
Step 349: 321204 + 923 = 322127
Step 350: 322127 + 923 = 323050
Step 351: 323050 + 923 = 323973
Step 352: 323973 + 923 = 324896
Step 353: 324896 + 923 = 325819
Step 354: 325819 + 923 = 326742
Step 355: 326742 + 923 = 327665
Step 356: 327665 + 923 = 328588
Step 357: 328588 + 923 = 329511
Step 358: 329511 + 923 = 330434
Step 359: 330434 + 923 = 331357
Step 360: 331357 + 923 = 332280
Step 361: 332280 + 923 = 333203
Step 362: 333203 + 923 = 334126
Step 363: 334126 + 923 = 335049
Step 364: 335049 + 923 = 335972
Step 365: 335972 + 923 = 336895
Step 366: 336895 + 923 = 337818
Step 367: 337818 + 923 = 338741
Step 368: 338741 + 923 = 339664
Step 369: 339664 + 923 = 340587
Step 370: 340587 + 923 = 341510
Step 371: 341510 + 923 = 342433
Step 372: 342433 + 923 = 343356
Step 373: 343356 + 923 = 344279
Step 374: 344279 + 923 = 345202
Step 375: 345202 + 923 = 346125
Step 376: 346125 + 923 = 347048
Step 377: 347048 + 923 = 347971
Step 378: 347971 + 923 = 348894
Step 379: 348894 + 923 = 349817
Step 380: 349817 + 923 = 350740
Step 381: 350740 + 923 = 351663
Step 382: 351663 + 923 = 352586
Step 383: 352586 + 923 = 353509
Step 384: 353509 + 923 = 354432
Step 385: 354432 + 923 = 355355
Step 386: 355355 + 923 = 356278
Step 387: 356278 + 923 = 357201
Step 388: 357201 + 923 = 358124
Step 389: 358124 + 923 = 359047
Step 390: 359047 + 923 = 359970
Step 391: 359970 + 923 = 360893
Step 392: 360893 + 923 = 361816
Step 393: 361816 + 923 = 362739
Step 394: 362739 + 923 = 363662
Step 395: 363662 + 923 = 364585
Step 396: 364585 + 923 = 365508
Step 397: 365508 + 923 = 366431
Step 398: 366431 + 923 = 367354
Step 399: 367354 + 923 = 368277
Step 400: 368277 + 923 = 369200
Step 401: 369200 + 923 = 370123
Step 402: 370123 + 923 = 371046
Step 403: 371046 + 923 = 371969
Step 404: 371969 + 923 = 372892

So, 923*404 = 372892