Alright, let's solve this math problem step by step. First, we have the number 257. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 142. So, we're going to take the number 257 and add it to itself 142 times.
Step 1: 0 + 257 = 257
Step 2: 257 + 257 = 514
Step 3: 514 + 257 = 771
Step 4: 771 + 257 = 1028
Step 5: 1028 + 257 = 1285
Step 6: 1285 + 257 = 1542
Step 7: 1542 + 257 = 1799
Step 8: 1799 + 257 = 2056
Step 9: 2056 + 257 = 2313
Step 10: 2313 + 257 = 2570
Step 11: 2570 + 257 = 2827
Step 12: 2827 + 257 = 3084
Step 13: 3084 + 257 = 3341
Step 14: 3341 + 257 = 3598
Step 15: 3598 + 257 = 3855
Step 16: 3855 + 257 = 4112
Step 17: 4112 + 257 = 4369
Step 18: 4369 + 257 = 4626
Step 19: 4626 + 257 = 4883
Step 20: 4883 + 257 = 5140
Step 21: 5140 + 257 = 5397
Step 22: 5397 + 257 = 5654
Step 23: 5654 + 257 = 5911
Step 24: 5911 + 257 = 6168
Step 25: 6168 + 257 = 6425
Step 26: 6425 + 257 = 6682
Step 27: 6682 + 257 = 6939
Step 28: 6939 + 257 = 7196
Step 29: 7196 + 257 = 7453
Step 30: 7453 + 257 = 7710
Step 31: 7710 + 257 = 7967
Step 32: 7967 + 257 = 8224
Step 33: 8224 + 257 = 8481
Step 34: 8481 + 257 = 8738
Step 35: 8738 + 257 = 8995
Step 36: 8995 + 257 = 9252
Step 37: 9252 + 257 = 9509
Step 38: 9509 + 257 = 9766
Step 39: 9766 + 257 = 10023
Step 40: 10023 + 257 = 10280
Step 41: 10280 + 257 = 10537
Step 42: 10537 + 257 = 10794
Step 43: 10794 + 257 = 11051
Step 44: 11051 + 257 = 11308
Step 45: 11308 + 257 = 11565
Step 46: 11565 + 257 = 11822
Step 47: 11822 + 257 = 12079
Step 48: 12079 + 257 = 12336
Step 49: 12336 + 257 = 12593
Step 50: 12593 + 257 = 12850
Step 51: 12850 + 257 = 13107
Step 52: 13107 + 257 = 13364
Step 53: 13364 + 257 = 13621
Step 54: 13621 + 257 = 13878
Step 55: 13878 + 257 = 14135
Step 56: 14135 + 257 = 14392
Step 57: 14392 + 257 = 14649
Step 58: 14649 + 257 = 14906
Step 59: 14906 + 257 = 15163
Step 60: 15163 + 257 = 15420
Step 61: 15420 + 257 = 15677
Step 62: 15677 + 257 = 15934
Step 63: 15934 + 257 = 16191
Step 64: 16191 + 257 = 16448
Step 65: 16448 + 257 = 16705
Step 66: 16705 + 257 = 16962
Step 67: 16962 + 257 = 17219
Step 68: 17219 + 257 = 17476
Step 69: 17476 + 257 = 17733
Step 70: 17733 + 257 = 17990
Step 71: 17990 + 257 = 18247
Step 72: 18247 + 257 = 18504
Step 73: 18504 + 257 = 18761
Step 74: 18761 + 257 = 19018
Step 75: 19018 + 257 = 19275
Step 76: 19275 + 257 = 19532
Step 77: 19532 + 257 = 19789
Step 78: 19789 + 257 = 20046
Step 79: 20046 + 257 = 20303
Step 80: 20303 + 257 = 20560
Step 81: 20560 + 257 = 20817
Step 82: 20817 + 257 = 21074
Step 83: 21074 + 257 = 21331
Step 84: 21331 + 257 = 21588
Step 85: 21588 + 257 = 21845
Step 86: 21845 + 257 = 22102
Step 87: 22102 + 257 = 22359
Step 88: 22359 + 257 = 22616
Step 89: 22616 + 257 = 22873
Step 90: 22873 + 257 = 23130
Step 91: 23130 + 257 = 23387
Step 92: 23387 + 257 = 23644
Step 93: 23644 + 257 = 23901
Step 94: 23901 + 257 = 24158
Step 95: 24158 + 257 = 24415
Step 96: 24415 + 257 = 24672
Step 97: 24672 + 257 = 24929
Step 98: 24929 + 257 = 25186
Step 99: 25186 + 257 = 25443
Step 100: 25443 + 257 = 25700
Step 101: 25700 + 257 = 25957
Step 102: 25957 + 257 = 26214
Step 103: 26214 + 257 = 26471
Step 104: 26471 + 257 = 26728
Step 105: 26728 + 257 = 26985
Step 106: 26985 + 257 = 27242
Step 107: 27242 + 257 = 27499
Step 108: 27499 + 257 = 27756
Step 109: 27756 + 257 = 28013
Step 110: 28013 + 257 = 28270
Step 111: 28270 + 257 = 28527
Step 112: 28527 + 257 = 28784
Step 113: 28784 + 257 = 29041
Step 114: 29041 + 257 = 29298
Step 115: 29298 + 257 = 29555
Step 116: 29555 + 257 = 29812
Step 117: 29812 + 257 = 30069
Step 118: 30069 + 257 = 30326
Step 119: 30326 + 257 = 30583
Step 120: 30583 + 257 = 30840
Step 121: 30840 + 257 = 31097
Step 122: 31097 + 257 = 31354
Step 123: 31354 + 257 = 31611
Step 124: 31611 + 257 = 31868
Step 125: 31868 + 257 = 32125
Step 126: 32125 + 257 = 32382
Step 127: 32382 + 257 = 32639
Step 128: 32639 + 257 = 32896
Step 129: 32896 + 257 = 33153
Step 130: 33153 + 257 = 33410
Step 131: 33410 + 257 = 33667
Step 132: 33667 + 257 = 33924
Step 133: 33924 + 257 = 34181
Step 134: 34181 + 257 = 34438
Step 135: 34438 + 257 = 34695
Step 136: 34695 + 257 = 34952
Step 137: 34952 + 257 = 35209
Step 138: 35209 + 257 = 35466
Step 139: 35466 + 257 = 35723
Step 140: 35723 + 257 = 35980
Step 141: 35980 + 257 = 36237
Step 142: 36237 + 257 = 36494

So, 257*142 = 36494