Alright, let's solve this math problem step by step. First, we have the number 457. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 312. So, we're going to take the number 457 and add it to itself 312 times.
Step 1: 0 + 457 = 457
Step 2: 457 + 457 = 914
Step 3: 914 + 457 = 1371
Step 4: 1371 + 457 = 1828
Step 5: 1828 + 457 = 2285
Step 6: 2285 + 457 = 2742
Step 7: 2742 + 457 = 3199
Step 8: 3199 + 457 = 3656
Step 9: 3656 + 457 = 4113
Step 10: 4113 + 457 = 4570
Step 11: 4570 + 457 = 5027
Step 12: 5027 + 457 = 5484
Step 13: 5484 + 457 = 5941
Step 14: 5941 + 457 = 6398
Step 15: 6398 + 457 = 6855
Step 16: 6855 + 457 = 7312
Step 17: 7312 + 457 = 7769
Step 18: 7769 + 457 = 8226
Step 19: 8226 + 457 = 8683
Step 20: 8683 + 457 = 9140
Step 21: 9140 + 457 = 9597
Step 22: 9597 + 457 = 10054
Step 23: 10054 + 457 = 10511
Step 24: 10511 + 457 = 10968
Step 25: 10968 + 457 = 11425
Step 26: 11425 + 457 = 11882
Step 27: 11882 + 457 = 12339
Step 28: 12339 + 457 = 12796
Step 29: 12796 + 457 = 13253
Step 30: 13253 + 457 = 13710
Step 31: 13710 + 457 = 14167
Step 32: 14167 + 457 = 14624
Step 33: 14624 + 457 = 15081
Step 34: 15081 + 457 = 15538
Step 35: 15538 + 457 = 15995
Step 36: 15995 + 457 = 16452
Step 37: 16452 + 457 = 16909
Step 38: 16909 + 457 = 17366
Step 39: 17366 + 457 = 17823
Step 40: 17823 + 457 = 18280
Step 41: 18280 + 457 = 18737
Step 42: 18737 + 457 = 19194
Step 43: 19194 + 457 = 19651
Step 44: 19651 + 457 = 20108
Step 45: 20108 + 457 = 20565
Step 46: 20565 + 457 = 21022
Step 47: 21022 + 457 = 21479
Step 48: 21479 + 457 = 21936
Step 49: 21936 + 457 = 22393
Step 50: 22393 + 457 = 22850
Step 51: 22850 + 457 = 23307
Step 52: 23307 + 457 = 23764
Step 53: 23764 + 457 = 24221
Step 54: 24221 + 457 = 24678
Step 55: 24678 + 457 = 25135
Step 56: 25135 + 457 = 25592
Step 57: 25592 + 457 = 26049
Step 58: 26049 + 457 = 26506
Step 59: 26506 + 457 = 26963
Step 60: 26963 + 457 = 27420
Step 61: 27420 + 457 = 27877
Step 62: 27877 + 457 = 28334
Step 63: 28334 + 457 = 28791
Step 64: 28791 + 457 = 29248
Step 65: 29248 + 457 = 29705
Step 66: 29705 + 457 = 30162
Step 67: 30162 + 457 = 30619
Step 68: 30619 + 457 = 31076
Step 69: 31076 + 457 = 31533
Step 70: 31533 + 457 = 31990
Step 71: 31990 + 457 = 32447
Step 72: 32447 + 457 = 32904
Step 73: 32904 + 457 = 33361
Step 74: 33361 + 457 = 33818
Step 75: 33818 + 457 = 34275
Step 76: 34275 + 457 = 34732
Step 77: 34732 + 457 = 35189
Step 78: 35189 + 457 = 35646
Step 79: 35646 + 457 = 36103
Step 80: 36103 + 457 = 36560
Step 81: 36560 + 457 = 37017
Step 82: 37017 + 457 = 37474
Step 83: 37474 + 457 = 37931
Step 84: 37931 + 457 = 38388
Step 85: 38388 + 457 = 38845
Step 86: 38845 + 457 = 39302
Step 87: 39302 + 457 = 39759
Step 88: 39759 + 457 = 40216
Step 89: 40216 + 457 = 40673
Step 90: 40673 + 457 = 41130
Step 91: 41130 + 457 = 41587
Step 92: 41587 + 457 = 42044
Step 93: 42044 + 457 = 42501
Step 94: 42501 + 457 = 42958
Step 95: 42958 + 457 = 43415
Step 96: 43415 + 457 = 43872
Step 97: 43872 + 457 = 44329
Step 98: 44329 + 457 = 44786
Step 99: 44786 + 457 = 45243
Step 100: 45243 + 457 = 45700
Step 101: 45700 + 457 = 46157
Step 102: 46157 + 457 = 46614
Step 103: 46614 + 457 = 47071
Step 104: 47071 + 457 = 47528
Step 105: 47528 + 457 = 47985
Step 106: 47985 + 457 = 48442
Step 107: 48442 + 457 = 48899
Step 108: 48899 + 457 = 49356
Step 109: 49356 + 457 = 49813
Step 110: 49813 + 457 = 50270
Step 111: 50270 + 457 = 50727
Step 112: 50727 + 457 = 51184
Step 113: 51184 + 457 = 51641
Step 114: 51641 + 457 = 52098
Step 115: 52098 + 457 = 52555
Step 116: 52555 + 457 = 53012
Step 117: 53012 + 457 = 53469
Step 118: 53469 + 457 = 53926
Step 119: 53926 + 457 = 54383
Step 120: 54383 + 457 = 54840
Step 121: 54840 + 457 = 55297
Step 122: 55297 + 457 = 55754
Step 123: 55754 + 457 = 56211
Step 124: 56211 + 457 = 56668
Step 125: 56668 + 457 = 57125
Step 126: 57125 + 457 = 57582
Step 127: 57582 + 457 = 58039
Step 128: 58039 + 457 = 58496
Step 129: 58496 + 457 = 58953
Step 130: 58953 + 457 = 59410
Step 131: 59410 + 457 = 59867
Step 132: 59867 + 457 = 60324
Step 133: 60324 + 457 = 60781
Step 134: 60781 + 457 = 61238
Step 135: 61238 + 457 = 61695
Step 136: 61695 + 457 = 62152
Step 137: 62152 + 457 = 62609
Step 138: 62609 + 457 = 63066
Step 139: 63066 + 457 = 63523
Step 140: 63523 + 457 = 63980
Step 141: 63980 + 457 = 64437
Step 142: 64437 + 457 = 64894
Step 143: 64894 + 457 = 65351
Step 144: 65351 + 457 = 65808
Step 145: 65808 + 457 = 66265
Step 146: 66265 + 457 = 66722
Step 147: 66722 + 457 = 67179
Step 148: 67179 + 457 = 67636
Step 149: 67636 + 457 = 68093
Step 150: 68093 + 457 = 68550
Step 151: 68550 + 457 = 69007
Step 152: 69007 + 457 = 69464
Step 153: 69464 + 457 = 69921
Step 154: 69921 + 457 = 70378
Step 155: 70378 + 457 = 70835
Step 156: 70835 + 457 = 71292
Step 157: 71292 + 457 = 71749
Step 158: 71749 + 457 = 72206
Step 159: 72206 + 457 = 72663
Step 160: 72663 + 457 = 73120
Step 161: 73120 + 457 = 73577
Step 162: 73577 + 457 = 74034
Step 163: 74034 + 457 = 74491
Step 164: 74491 + 457 = 74948
Step 165: 74948 + 457 = 75405
Step 166: 75405 + 457 = 75862
Step 167: 75862 + 457 = 76319
Step 168: 76319 + 457 = 76776
Step 169: 76776 + 457 = 77233
Step 170: 77233 + 457 = 77690
Step 171: 77690 + 457 = 78147
Step 172: 78147 + 457 = 78604
Step 173: 78604 + 457 = 79061
Step 174: 79061 + 457 = 79518
Step 175: 79518 + 457 = 79975
Step 176: 79975 + 457 = 80432
Step 177: 80432 + 457 = 80889
Step 178: 80889 + 457 = 81346
Step 179: 81346 + 457 = 81803
Step 180: 81803 + 457 = 82260
Step 181: 82260 + 457 = 82717
Step 182: 82717 + 457 = 83174
Step 183: 83174 + 457 = 83631
Step 184: 83631 + 457 = 84088
Step 185: 84088 + 457 = 84545
Step 186: 84545 + 457 = 85002
Step 187: 85002 + 457 = 85459
Step 188: 85459 + 457 = 85916
Step 189: 85916 + 457 = 86373
Step 190: 86373 + 457 = 86830
Step 191: 86830 + 457 = 87287
Step 192: 87287 + 457 = 87744
Step 193: 87744 + 457 = 88201
Step 194: 88201 + 457 = 88658
Step 195: 88658 + 457 = 89115
Step 196: 89115 + 457 = 89572
Step 197: 89572 + 457 = 90029
Step 198: 90029 + 457 = 90486
Step 199: 90486 + 457 = 90943
Step 200: 90943 + 457 = 91400
Step 201: 91400 + 457 = 91857
Step 202: 91857 + 457 = 92314
Step 203: 92314 + 457 = 92771
Step 204: 92771 + 457 = 93228
Step 205: 93228 + 457 = 93685
Step 206: 93685 + 457 = 94142
Step 207: 94142 + 457 = 94599
Step 208: 94599 + 457 = 95056
Step 209: 95056 + 457 = 95513
Step 210: 95513 + 457 = 95970
Step 211: 95970 + 457 = 96427
Step 212: 96427 + 457 = 96884
Step 213: 96884 + 457 = 97341
Step 214: 97341 + 457 = 97798
Step 215: 97798 + 457 = 98255
Step 216: 98255 + 457 = 98712
Step 217: 98712 + 457 = 99169
Step 218: 99169 + 457 = 99626
Step 219: 99626 + 457 = 100083
Step 220: 100083 + 457 = 100540
Step 221: 100540 + 457 = 100997
Step 222: 100997 + 457 = 101454
Step 223: 101454 + 457 = 101911
Step 224: 101911 + 457 = 102368
Step 225: 102368 + 457 = 102825
Step 226: 102825 + 457 = 103282
Step 227: 103282 + 457 = 103739
Step 228: 103739 + 457 = 104196
Step 229: 104196 + 457 = 104653
Step 230: 104653 + 457 = 105110
Step 231: 105110 + 457 = 105567
Step 232: 105567 + 457 = 106024
Step 233: 106024 + 457 = 106481
Step 234: 106481 + 457 = 106938
Step 235: 106938 + 457 = 107395
Step 236: 107395 + 457 = 107852
Step 237: 107852 + 457 = 108309
Step 238: 108309 + 457 = 108766
Step 239: 108766 + 457 = 109223
Step 240: 109223 + 457 = 109680
Step 241: 109680 + 457 = 110137
Step 242: 110137 + 457 = 110594
Step 243: 110594 + 457 = 111051
Step 244: 111051 + 457 = 111508
Step 245: 111508 + 457 = 111965
Step 246: 111965 + 457 = 112422
Step 247: 112422 + 457 = 112879
Step 248: 112879 + 457 = 113336
Step 249: 113336 + 457 = 113793
Step 250: 113793 + 457 = 114250
Step 251: 114250 + 457 = 114707
Step 252: 114707 + 457 = 115164
Step 253: 115164 + 457 = 115621
Step 254: 115621 + 457 = 116078
Step 255: 116078 + 457 = 116535
Step 256: 116535 + 457 = 116992
Step 257: 116992 + 457 = 117449
Step 258: 117449 + 457 = 117906
Step 259: 117906 + 457 = 118363
Step 260: 118363 + 457 = 118820
Step 261: 118820 + 457 = 119277
Step 262: 119277 + 457 = 119734
Step 263: 119734 + 457 = 120191
Step 264: 120191 + 457 = 120648
Step 265: 120648 + 457 = 121105
Step 266: 121105 + 457 = 121562
Step 267: 121562 + 457 = 122019
Step 268: 122019 + 457 = 122476
Step 269: 122476 + 457 = 122933
Step 270: 122933 + 457 = 123390
Step 271: 123390 + 457 = 123847
Step 272: 123847 + 457 = 124304
Step 273: 124304 + 457 = 124761
Step 274: 124761 + 457 = 125218
Step 275: 125218 + 457 = 125675
Step 276: 125675 + 457 = 126132
Step 277: 126132 + 457 = 126589
Step 278: 126589 + 457 = 127046
Step 279: 127046 + 457 = 127503
Step 280: 127503 + 457 = 127960
Step 281: 127960 + 457 = 128417
Step 282: 128417 + 457 = 128874
Step 283: 128874 + 457 = 129331
Step 284: 129331 + 457 = 129788
Step 285: 129788 + 457 = 130245
Step 286: 130245 + 457 = 130702
Step 287: 130702 + 457 = 131159
Step 288: 131159 + 457 = 131616
Step 289: 131616 + 457 = 132073
Step 290: 132073 + 457 = 132530
Step 291: 132530 + 457 = 132987
Step 292: 132987 + 457 = 133444
Step 293: 133444 + 457 = 133901
Step 294: 133901 + 457 = 134358
Step 295: 134358 + 457 = 134815
Step 296: 134815 + 457 = 135272
Step 297: 135272 + 457 = 135729
Step 298: 135729 + 457 = 136186
Step 299: 136186 + 457 = 136643
Step 300: 136643 + 457 = 137100
Step 301: 137100 + 457 = 137557
Step 302: 137557 + 457 = 138014
Step 303: 138014 + 457 = 138471
Step 304: 138471 + 457 = 138928
Step 305: 138928 + 457 = 139385
Step 306: 139385 + 457 = 139842
Step 307: 139842 + 457 = 140299
Step 308: 140299 + 457 = 140756
Step 309: 140756 + 457 = 141213
Step 310: 141213 + 457 = 141670
Step 311: 141670 + 457 = 142127
Step 312: 142127 + 457 = 142584

So, 457*312 = 142584