Alright, let's solve this math problem step by step. First, we have the number 931. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 405. So, we're going to take the number 931 and add it to itself 405 times.
Step 1: 0 + 931 = 931
Step 2: 931 + 931 = 1862
Step 3: 1862 + 931 = 2793
Step 4: 2793 + 931 = 3724
Step 5: 3724 + 931 = 4655
Step 6: 4655 + 931 = 5586
Step 7: 5586 + 931 = 6517
Step 8: 6517 + 931 = 7448
Step 9: 7448 + 931 = 8379
Step 10: 8379 + 931 = 9310
Step 11: 9310 + 931 = 10241
Step 12: 10241 + 931 = 11172
Step 13: 11172 + 931 = 12103
Step 14: 12103 + 931 = 13034
Step 15: 13034 + 931 = 13965
Step 16: 13965 + 931 = 14896
Step 17: 14896 + 931 = 15827
Step 18: 15827 + 931 = 16758
Step 19: 16758 + 931 = 17689
Step 20: 17689 + 931 = 18620
Step 21: 18620 + 931 = 19551
Step 22: 19551 + 931 = 20482
Step 23: 20482 + 931 = 21413
Step 24: 21413 + 931 = 22344
Step 25: 22344 + 931 = 23275
Step 26: 23275 + 931 = 24206
Step 27: 24206 + 931 = 25137
Step 28: 25137 + 931 = 26068
Step 29: 26068 + 931 = 26999
Step 30: 26999 + 931 = 27930
Step 31: 27930 + 931 = 28861
Step 32: 28861 + 931 = 29792
Step 33: 29792 + 931 = 30723
Step 34: 30723 + 931 = 31654
Step 35: 31654 + 931 = 32585
Step 36: 32585 + 931 = 33516
Step 37: 33516 + 931 = 34447
Step 38: 34447 + 931 = 35378
Step 39: 35378 + 931 = 36309
Step 40: 36309 + 931 = 37240
Step 41: 37240 + 931 = 38171
Step 42: 38171 + 931 = 39102
Step 43: 39102 + 931 = 40033
Step 44: 40033 + 931 = 40964
Step 45: 40964 + 931 = 41895
Step 46: 41895 + 931 = 42826
Step 47: 42826 + 931 = 43757
Step 48: 43757 + 931 = 44688
Step 49: 44688 + 931 = 45619
Step 50: 45619 + 931 = 46550
Step 51: 46550 + 931 = 47481
Step 52: 47481 + 931 = 48412
Step 53: 48412 + 931 = 49343
Step 54: 49343 + 931 = 50274
Step 55: 50274 + 931 = 51205
Step 56: 51205 + 931 = 52136
Step 57: 52136 + 931 = 53067
Step 58: 53067 + 931 = 53998
Step 59: 53998 + 931 = 54929
Step 60: 54929 + 931 = 55860
Step 61: 55860 + 931 = 56791
Step 62: 56791 + 931 = 57722
Step 63: 57722 + 931 = 58653
Step 64: 58653 + 931 = 59584
Step 65: 59584 + 931 = 60515
Step 66: 60515 + 931 = 61446
Step 67: 61446 + 931 = 62377
Step 68: 62377 + 931 = 63308
Step 69: 63308 + 931 = 64239
Step 70: 64239 + 931 = 65170
Step 71: 65170 + 931 = 66101
Step 72: 66101 + 931 = 67032
Step 73: 67032 + 931 = 67963
Step 74: 67963 + 931 = 68894
Step 75: 68894 + 931 = 69825
Step 76: 69825 + 931 = 70756
Step 77: 70756 + 931 = 71687
Step 78: 71687 + 931 = 72618
Step 79: 72618 + 931 = 73549
Step 80: 73549 + 931 = 74480
Step 81: 74480 + 931 = 75411
Step 82: 75411 + 931 = 76342
Step 83: 76342 + 931 = 77273
Step 84: 77273 + 931 = 78204
Step 85: 78204 + 931 = 79135
Step 86: 79135 + 931 = 80066
Step 87: 80066 + 931 = 80997
Step 88: 80997 + 931 = 81928
Step 89: 81928 + 931 = 82859
Step 90: 82859 + 931 = 83790
Step 91: 83790 + 931 = 84721
Step 92: 84721 + 931 = 85652
Step 93: 85652 + 931 = 86583
Step 94: 86583 + 931 = 87514
Step 95: 87514 + 931 = 88445
Step 96: 88445 + 931 = 89376
Step 97: 89376 + 931 = 90307
Step 98: 90307 + 931 = 91238
Step 99: 91238 + 931 = 92169
Step 100: 92169 + 931 = 93100
Step 101: 93100 + 931 = 94031
Step 102: 94031 + 931 = 94962
Step 103: 94962 + 931 = 95893
Step 104: 95893 + 931 = 96824
Step 105: 96824 + 931 = 97755
Step 106: 97755 + 931 = 98686
Step 107: 98686 + 931 = 99617
Step 108: 99617 + 931 = 100548
Step 109: 100548 + 931 = 101479
Step 110: 101479 + 931 = 102410
Step 111: 102410 + 931 = 103341
Step 112: 103341 + 931 = 104272
Step 113: 104272 + 931 = 105203
Step 114: 105203 + 931 = 106134
Step 115: 106134 + 931 = 107065
Step 116: 107065 + 931 = 107996
Step 117: 107996 + 931 = 108927
Step 118: 108927 + 931 = 109858
Step 119: 109858 + 931 = 110789
Step 120: 110789 + 931 = 111720
Step 121: 111720 + 931 = 112651
Step 122: 112651 + 931 = 113582
Step 123: 113582 + 931 = 114513
Step 124: 114513 + 931 = 115444
Step 125: 115444 + 931 = 116375
Step 126: 116375 + 931 = 117306
Step 127: 117306 + 931 = 118237
Step 128: 118237 + 931 = 119168
Step 129: 119168 + 931 = 120099
Step 130: 120099 + 931 = 121030
Step 131: 121030 + 931 = 121961
Step 132: 121961 + 931 = 122892
Step 133: 122892 + 931 = 123823
Step 134: 123823 + 931 = 124754
Step 135: 124754 + 931 = 125685
Step 136: 125685 + 931 = 126616
Step 137: 126616 + 931 = 127547
Step 138: 127547 + 931 = 128478
Step 139: 128478 + 931 = 129409
Step 140: 129409 + 931 = 130340
Step 141: 130340 + 931 = 131271
Step 142: 131271 + 931 = 132202
Step 143: 132202 + 931 = 133133
Step 144: 133133 + 931 = 134064
Step 145: 134064 + 931 = 134995
Step 146: 134995 + 931 = 135926
Step 147: 135926 + 931 = 136857
Step 148: 136857 + 931 = 137788
Step 149: 137788 + 931 = 138719
Step 150: 138719 + 931 = 139650
Step 151: 139650 + 931 = 140581
Step 152: 140581 + 931 = 141512
Step 153: 141512 + 931 = 142443
Step 154: 142443 + 931 = 143374
Step 155: 143374 + 931 = 144305
Step 156: 144305 + 931 = 145236
Step 157: 145236 + 931 = 146167
Step 158: 146167 + 931 = 147098
Step 159: 147098 + 931 = 148029
Step 160: 148029 + 931 = 148960
Step 161: 148960 + 931 = 149891
Step 162: 149891 + 931 = 150822
Step 163: 150822 + 931 = 151753
Step 164: 151753 + 931 = 152684
Step 165: 152684 + 931 = 153615
Step 166: 153615 + 931 = 154546
Step 167: 154546 + 931 = 155477
Step 168: 155477 + 931 = 156408
Step 169: 156408 + 931 = 157339
Step 170: 157339 + 931 = 158270
Step 171: 158270 + 931 = 159201
Step 172: 159201 + 931 = 160132
Step 173: 160132 + 931 = 161063
Step 174: 161063 + 931 = 161994
Step 175: 161994 + 931 = 162925
Step 176: 162925 + 931 = 163856
Step 177: 163856 + 931 = 164787
Step 178: 164787 + 931 = 165718
Step 179: 165718 + 931 = 166649
Step 180: 166649 + 931 = 167580
Step 181: 167580 + 931 = 168511
Step 182: 168511 + 931 = 169442
Step 183: 169442 + 931 = 170373
Step 184: 170373 + 931 = 171304
Step 185: 171304 + 931 = 172235
Step 186: 172235 + 931 = 173166
Step 187: 173166 + 931 = 174097
Step 188: 174097 + 931 = 175028
Step 189: 175028 + 931 = 175959
Step 190: 175959 + 931 = 176890
Step 191: 176890 + 931 = 177821
Step 192: 177821 + 931 = 178752
Step 193: 178752 + 931 = 179683
Step 194: 179683 + 931 = 180614
Step 195: 180614 + 931 = 181545
Step 196: 181545 + 931 = 182476
Step 197: 182476 + 931 = 183407
Step 198: 183407 + 931 = 184338
Step 199: 184338 + 931 = 185269
Step 200: 185269 + 931 = 186200
Step 201: 186200 + 931 = 187131
Step 202: 187131 + 931 = 188062
Step 203: 188062 + 931 = 188993
Step 204: 188993 + 931 = 189924
Step 205: 189924 + 931 = 190855
Step 206: 190855 + 931 = 191786
Step 207: 191786 + 931 = 192717
Step 208: 192717 + 931 = 193648
Step 209: 193648 + 931 = 194579
Step 210: 194579 + 931 = 195510
Step 211: 195510 + 931 = 196441
Step 212: 196441 + 931 = 197372
Step 213: 197372 + 931 = 198303
Step 214: 198303 + 931 = 199234
Step 215: 199234 + 931 = 200165
Step 216: 200165 + 931 = 201096
Step 217: 201096 + 931 = 202027
Step 218: 202027 + 931 = 202958
Step 219: 202958 + 931 = 203889
Step 220: 203889 + 931 = 204820
Step 221: 204820 + 931 = 205751
Step 222: 205751 + 931 = 206682
Step 223: 206682 + 931 = 207613
Step 224: 207613 + 931 = 208544
Step 225: 208544 + 931 = 209475
Step 226: 209475 + 931 = 210406
Step 227: 210406 + 931 = 211337
Step 228: 211337 + 931 = 212268
Step 229: 212268 + 931 = 213199
Step 230: 213199 + 931 = 214130
Step 231: 214130 + 931 = 215061
Step 232: 215061 + 931 = 215992
Step 233: 215992 + 931 = 216923
Step 234: 216923 + 931 = 217854
Step 235: 217854 + 931 = 218785
Step 236: 218785 + 931 = 219716
Step 237: 219716 + 931 = 220647
Step 238: 220647 + 931 = 221578
Step 239: 221578 + 931 = 222509
Step 240: 222509 + 931 = 223440
Step 241: 223440 + 931 = 224371
Step 242: 224371 + 931 = 225302
Step 243: 225302 + 931 = 226233
Step 244: 226233 + 931 = 227164
Step 245: 227164 + 931 = 228095
Step 246: 228095 + 931 = 229026
Step 247: 229026 + 931 = 229957
Step 248: 229957 + 931 = 230888
Step 249: 230888 + 931 = 231819
Step 250: 231819 + 931 = 232750
Step 251: 232750 + 931 = 233681
Step 252: 233681 + 931 = 234612
Step 253: 234612 + 931 = 235543
Step 254: 235543 + 931 = 236474
Step 255: 236474 + 931 = 237405
Step 256: 237405 + 931 = 238336
Step 257: 238336 + 931 = 239267
Step 258: 239267 + 931 = 240198
Step 259: 240198 + 931 = 241129
Step 260: 241129 + 931 = 242060
Step 261: 242060 + 931 = 242991
Step 262: 242991 + 931 = 243922
Step 263: 243922 + 931 = 244853
Step 264: 244853 + 931 = 245784
Step 265: 245784 + 931 = 246715
Step 266: 246715 + 931 = 247646
Step 267: 247646 + 931 = 248577
Step 268: 248577 + 931 = 249508
Step 269: 249508 + 931 = 250439
Step 270: 250439 + 931 = 251370
Step 271: 251370 + 931 = 252301
Step 272: 252301 + 931 = 253232
Step 273: 253232 + 931 = 254163
Step 274: 254163 + 931 = 255094
Step 275: 255094 + 931 = 256025
Step 276: 256025 + 931 = 256956
Step 277: 256956 + 931 = 257887
Step 278: 257887 + 931 = 258818
Step 279: 258818 + 931 = 259749
Step 280: 259749 + 931 = 260680
Step 281: 260680 + 931 = 261611
Step 282: 261611 + 931 = 262542
Step 283: 262542 + 931 = 263473
Step 284: 263473 + 931 = 264404
Step 285: 264404 + 931 = 265335
Step 286: 265335 + 931 = 266266
Step 287: 266266 + 931 = 267197
Step 288: 267197 + 931 = 268128
Step 289: 268128 + 931 = 269059
Step 290: 269059 + 931 = 269990
Step 291: 269990 + 931 = 270921
Step 292: 270921 + 931 = 271852
Step 293: 271852 + 931 = 272783
Step 294: 272783 + 931 = 273714
Step 295: 273714 + 931 = 274645
Step 296: 274645 + 931 = 275576
Step 297: 275576 + 931 = 276507
Step 298: 276507 + 931 = 277438
Step 299: 277438 + 931 = 278369
Step 300: 278369 + 931 = 279300
Step 301: 279300 + 931 = 280231
Step 302: 280231 + 931 = 281162
Step 303: 281162 + 931 = 282093
Step 304: 282093 + 931 = 283024
Step 305: 283024 + 931 = 283955
Step 306: 283955 + 931 = 284886
Step 307: 284886 + 931 = 285817
Step 308: 285817 + 931 = 286748
Step 309: 286748 + 931 = 287679
Step 310: 287679 + 931 = 288610
Step 311: 288610 + 931 = 289541
Step 312: 289541 + 931 = 290472
Step 313: 290472 + 931 = 291403
Step 314: 291403 + 931 = 292334
Step 315: 292334 + 931 = 293265
Step 316: 293265 + 931 = 294196
Step 317: 294196 + 931 = 295127
Step 318: 295127 + 931 = 296058
Step 319: 296058 + 931 = 296989
Step 320: 296989 + 931 = 297920
Step 321: 297920 + 931 = 298851
Step 322: 298851 + 931 = 299782
Step 323: 299782 + 931 = 300713
Step 324: 300713 + 931 = 301644
Step 325: 301644 + 931 = 302575
Step 326: 302575 + 931 = 303506
Step 327: 303506 + 931 = 304437
Step 328: 304437 + 931 = 305368
Step 329: 305368 + 931 = 306299
Step 330: 306299 + 931 = 307230
Step 331: 307230 + 931 = 308161
Step 332: 308161 + 931 = 309092
Step 333: 309092 + 931 = 310023
Step 334: 310023 + 931 = 310954
Step 335: 310954 + 931 = 311885
Step 336: 311885 + 931 = 312816
Step 337: 312816 + 931 = 313747
Step 338: 313747 + 931 = 314678
Step 339: 314678 + 931 = 315609
Step 340: 315609 + 931 = 316540
Step 341: 316540 + 931 = 317471
Step 342: 317471 + 931 = 318402
Step 343: 318402 + 931 = 319333
Step 344: 319333 + 931 = 320264
Step 345: 320264 + 931 = 321195
Step 346: 321195 + 931 = 322126
Step 347: 322126 + 931 = 323057
Step 348: 323057 + 931 = 323988
Step 349: 323988 + 931 = 324919
Step 350: 324919 + 931 = 325850
Step 351: 325850 + 931 = 326781
Step 352: 326781 + 931 = 327712
Step 353: 327712 + 931 = 328643
Step 354: 328643 + 931 = 329574
Step 355: 329574 + 931 = 330505
Step 356: 330505 + 931 = 331436
Step 357: 331436 + 931 = 332367
Step 358: 332367 + 931 = 333298
Step 359: 333298 + 931 = 334229
Step 360: 334229 + 931 = 335160
Step 361: 335160 + 931 = 336091
Step 362: 336091 + 931 = 337022
Step 363: 337022 + 931 = 337953
Step 364: 337953 + 931 = 338884
Step 365: 338884 + 931 = 339815
Step 366: 339815 + 931 = 340746
Step 367: 340746 + 931 = 341677
Step 368: 341677 + 931 = 342608
Step 369: 342608 + 931 = 343539
Step 370: 343539 + 931 = 344470
Step 371: 344470 + 931 = 345401
Step 372: 345401 + 931 = 346332
Step 373: 346332 + 931 = 347263
Step 374: 347263 + 931 = 348194
Step 375: 348194 + 931 = 349125
Step 376: 349125 + 931 = 350056
Step 377: 350056 + 931 = 350987
Step 378: 350987 + 931 = 351918
Step 379: 351918 + 931 = 352849
Step 380: 352849 + 931 = 353780
Step 381: 353780 + 931 = 354711
Step 382: 354711 + 931 = 355642
Step 383: 355642 + 931 = 356573
Step 384: 356573 + 931 = 357504
Step 385: 357504 + 931 = 358435
Step 386: 358435 + 931 = 359366
Step 387: 359366 + 931 = 360297
Step 388: 360297 + 931 = 361228
Step 389: 361228 + 931 = 362159
Step 390: 362159 + 931 = 363090
Step 391: 363090 + 931 = 364021
Step 392: 364021 + 931 = 364952
Step 393: 364952 + 931 = 365883
Step 394: 365883 + 931 = 366814
Step 395: 366814 + 931 = 367745
Step 396: 367745 + 931 = 368676
Step 397: 368676 + 931 = 369607
Step 398: 369607 + 931 = 370538
Step 399: 370538 + 931 = 371469
Step 400: 371469 + 931 = 372400
Step 401: 372400 + 931 = 373331
Step 402: 373331 + 931 = 374262
Step 403: 374262 + 931 = 375193
Step 404: 375193 + 931 = 376124
Step 405: 376124 + 931 = 377055

So, 931*405 = 377055