OK, let's work through this together. We're starting with 519 and we're going to multiply it by 142, which means we add 519 to itself 142 times.
Step 1: 0 + 519 = 519
Step 2: 519 + 519 = 1038
Step 3: 1038 + 519 = 1557
Step 4: 1557 + 519 = 2076
Step 5: 2076 + 519 = 2595
Step 6: 2595 + 519 = 3114
Step 7: 3114 + 519 = 3633
Step 8: 3633 + 519 = 4152
Step 9: 4152 + 519 = 4671
Step 10: 4671 + 519 = 5190
Step 11: 5190 + 519 = 5709
Step 12: 5709 + 519 = 6228
Step 13: 6228 + 519 = 6747
Step 14: 6747 + 519 = 7266
Step 15: 7266 + 519 = 7785
Step 16: 7785 + 519 = 8304
Step 17: 8304 + 519 = 8823
Step 18: 8823 + 519 = 9342
Step 19: 9342 + 519 = 9861
Step 20: 9861 + 519 = 10380
Step 21: 10380 + 519 = 10899
Step 22: 10899 + 519 = 11418
Step 23: 11418 + 519 = 11937
Step 24: 11937 + 519 = 12456
Step 25: 12456 + 519 = 12975
Step 26: 12975 + 519 = 13494
Step 27: 13494 + 519 = 14013
Step 28: 14013 + 519 = 14532
Step 29: 14532 + 519 = 15051
Step 30: 15051 + 519 = 15570
Step 31: 15570 + 519 = 16089
Step 32: 16089 + 519 = 16608
Step 33: 16608 + 519 = 17127
Step 34: 17127 + 519 = 17646
Step 35: 17646 + 519 = 18165
Step 36: 18165 + 519 = 18684
Step 37: 18684 + 519 = 19203
Step 38: 19203 + 519 = 19722
Step 39: 19722 + 519 = 20241
Step 40: 20241 + 519 = 20760
Step 41: 20760 + 519 = 21279
Step 42: 21279 + 519 = 21798
Step 43: 21798 + 519 = 22317
Step 44: 22317 + 519 = 22836
Step 45: 22836 + 519 = 23355
Step 46: 23355 + 519 = 23874
Step 47: 23874 + 519 = 24393
Step 48: 24393 + 519 = 24912
Step 49: 24912 + 519 = 25431
Step 50: 25431 + 519 = 25950
Step 51: 25950 + 519 = 26469
Step 52: 26469 + 519 = 26988
Step 53: 26988 + 519 = 27507
Step 54: 27507 + 519 = 28026
Step 55: 28026 + 519 = 28545
Step 56: 28545 + 519 = 29064
Step 57: 29064 + 519 = 29583
Step 58: 29583 + 519 = 30102
Step 59: 30102 + 519 = 30621
Step 60: 30621 + 519 = 31140
Step 61: 31140 + 519 = 31659
Step 62: 31659 + 519 = 32178
Step 63: 32178 + 519 = 32697
Step 64: 32697 + 519 = 33216
Step 65: 33216 + 519 = 33735
Step 66: 33735 + 519 = 34254
Step 67: 34254 + 519 = 34773
Step 68: 34773 + 519 = 35292
Step 69: 35292 + 519 = 35811
Step 70: 35811 + 519 = 36330
Step 71: 36330 + 519 = 36849
Step 72: 36849 + 519 = 37368
Step 73: 37368 + 519 = 37887
Step 74: 37887 + 519 = 38406
Step 75: 38406 + 519 = 38925
Step 76: 38925 + 519 = 39444
Step 77: 39444 + 519 = 39963
Step 78: 39963 + 519 = 40482
Step 79: 40482 + 519 = 41001
Step 80: 41001 + 519 = 41520
Step 81: 41520 + 519 = 42039
Step 82: 42039 + 519 = 42558
Step 83: 42558 + 519 = 43077
Step 84: 43077 + 519 = 43596
Step 85: 43596 + 519 = 44115
Step 86: 44115 + 519 = 44634
Step 87: 44634 + 519 = 45153
Step 88: 45153 + 519 = 45672
Step 89: 45672 + 519 = 46191
Step 90: 46191 + 519 = 46710
Step 91: 46710 + 519 = 47229
Step 92: 47229 + 519 = 47748
Step 93: 47748 + 519 = 48267
Step 94: 48267 + 519 = 48786
Step 95: 48786 + 519 = 49305
Step 96: 49305 + 519 = 49824
Step 97: 49824 + 519 = 50343
Step 98: 50343 + 519 = 50862
Step 99: 50862 + 519 = 51381
Step 100: 51381 + 519 = 51900
Step 101: 51900 + 519 = 52419
Step 102: 52419 + 519 = 52938
Step 103: 52938 + 519 = 53457
Step 104: 53457 + 519 = 53976
Step 105: 53976 + 519 = 54495
Step 106: 54495 + 519 = 55014
Step 107: 55014 + 519 = 55533
Step 108: 55533 + 519 = 56052
Step 109: 56052 + 519 = 56571
Step 110: 56571 + 519 = 57090
Step 111: 57090 + 519 = 57609
Step 112: 57609 + 519 = 58128
Step 113: 58128 + 519 = 58647
Step 114: 58647 + 519 = 59166
Step 115: 59166 + 519 = 59685
Step 116: 59685 + 519 = 60204
Step 117: 60204 + 519 = 60723
Step 118: 60723 + 519 = 61242
Step 119: 61242 + 519 = 61761
Step 120: 61761 + 519 = 62280
Step 121: 62280 + 519 = 62799
Step 122: 62799 + 519 = 63318
Step 123: 63318 + 519 = 63837
Step 124: 63837 + 519 = 64356
Step 125: 64356 + 519 = 64875
Step 126: 64875 + 519 = 65394
Step 127: 65394 + 519 = 65913
Step 128: 65913 + 519 = 66432
Step 129: 66432 + 519 = 66951
Step 130: 66951 + 519 = 67470
Step 131: 67470 + 519 = 67989
Step 132: 67989 + 519 = 68508
Step 133: 68508 + 519 = 69027
Step 134: 69027 + 519 = 69546
Step 135: 69546 + 519 = 70065
Step 136: 70065 + 519 = 70584
Step 137: 70584 + 519 = 71103
Step 138: 71103 + 519 = 71622
Step 139: 71622 + 519 = 72141
Step 140: 72141 + 519 = 72660
Step 141: 72660 + 519 = 73179
Step 142: 73179 + 519 = 73698

So, 519*142 = 73698