Let's roll up our sleeves and solve this. We have 539 and we're going to multiply it by 140, essentially adding 539 to itself 140 times.
Step 1: 0 + 539 = 539
Step 2: 539 + 539 = 1078
Step 3: 1078 + 539 = 1617
Step 4: 1617 + 539 = 2156
Step 5: 2156 + 539 = 2695
Step 6: 2695 + 539 = 3234
Step 7: 3234 + 539 = 3773
Step 8: 3773 + 539 = 4312
Step 9: 4312 + 539 = 4851
Step 10: 4851 + 539 = 5390
Step 11: 5390 + 539 = 5929
Step 12: 5929 + 539 = 6468
Step 13: 6468 + 539 = 7007
Step 14: 7007 + 539 = 7546
Step 15: 7546 + 539 = 8085
Step 16: 8085 + 539 = 8624
Step 17: 8624 + 539 = 9163
Step 18: 9163 + 539 = 9702
Step 19: 9702 + 539 = 10241
Step 20: 10241 + 539 = 10780
Step 21: 10780 + 539 = 11319
Step 22: 11319 + 539 = 11858
Step 23: 11858 + 539 = 12397
Step 24: 12397 + 539 = 12936
Step 25: 12936 + 539 = 13475
Step 26: 13475 + 539 = 14014
Step 27: 14014 + 539 = 14553
Step 28: 14553 + 539 = 15092
Step 29: 15092 + 539 = 15631
Step 30: 15631 + 539 = 16170
Step 31: 16170 + 539 = 16709
Step 32: 16709 + 539 = 17248
Step 33: 17248 + 539 = 17787
Step 34: 17787 + 539 = 18326
Step 35: 18326 + 539 = 18865
Step 36: 18865 + 539 = 19404
Step 37: 19404 + 539 = 19943
Step 38: 19943 + 539 = 20482
Step 39: 20482 + 539 = 21021
Step 40: 21021 + 539 = 21560
Step 41: 21560 + 539 = 22099
Step 42: 22099 + 539 = 22638
Step 43: 22638 + 539 = 23177
Step 44: 23177 + 539 = 23716
Step 45: 23716 + 539 = 24255
Step 46: 24255 + 539 = 24794
Step 47: 24794 + 539 = 25333
Step 48: 25333 + 539 = 25872
Step 49: 25872 + 539 = 26411
Step 50: 26411 + 539 = 26950
Step 51: 26950 + 539 = 27489
Step 52: 27489 + 539 = 28028
Step 53: 28028 + 539 = 28567
Step 54: 28567 + 539 = 29106
Step 55: 29106 + 539 = 29645
Step 56: 29645 + 539 = 30184
Step 57: 30184 + 539 = 30723
Step 58: 30723 + 539 = 31262
Step 59: 31262 + 539 = 31801
Step 60: 31801 + 539 = 32340
Step 61: 32340 + 539 = 32879
Step 62: 32879 + 539 = 33418
Step 63: 33418 + 539 = 33957
Step 64: 33957 + 539 = 34496
Step 65: 34496 + 539 = 35035
Step 66: 35035 + 539 = 35574
Step 67: 35574 + 539 = 36113
Step 68: 36113 + 539 = 36652
Step 69: 36652 + 539 = 37191
Step 70: 37191 + 539 = 37730
Step 71: 37730 + 539 = 38269
Step 72: 38269 + 539 = 38808
Step 73: 38808 + 539 = 39347
Step 74: 39347 + 539 = 39886
Step 75: 39886 + 539 = 40425
Step 76: 40425 + 539 = 40964
Step 77: 40964 + 539 = 41503
Step 78: 41503 + 539 = 42042
Step 79: 42042 + 539 = 42581
Step 80: 42581 + 539 = 43120
Step 81: 43120 + 539 = 43659
Step 82: 43659 + 539 = 44198
Step 83: 44198 + 539 = 44737
Step 84: 44737 + 539 = 45276
Step 85: 45276 + 539 = 45815
Step 86: 45815 + 539 = 46354
Step 87: 46354 + 539 = 46893
Step 88: 46893 + 539 = 47432
Step 89: 47432 + 539 = 47971
Step 90: 47971 + 539 = 48510
Step 91: 48510 + 539 = 49049
Step 92: 49049 + 539 = 49588
Step 93: 49588 + 539 = 50127
Step 94: 50127 + 539 = 50666
Step 95: 50666 + 539 = 51205
Step 96: 51205 + 539 = 51744
Step 97: 51744 + 539 = 52283
Step 98: 52283 + 539 = 52822
Step 99: 52822 + 539 = 53361
Step 100: 53361 + 539 = 53900
Step 101: 53900 + 539 = 54439
Step 102: 54439 + 539 = 54978
Step 103: 54978 + 539 = 55517
Step 104: 55517 + 539 = 56056
Step 105: 56056 + 539 = 56595
Step 106: 56595 + 539 = 57134
Step 107: 57134 + 539 = 57673
Step 108: 57673 + 539 = 58212
Step 109: 58212 + 539 = 58751
Step 110: 58751 + 539 = 59290
Step 111: 59290 + 539 = 59829
Step 112: 59829 + 539 = 60368
Step 113: 60368 + 539 = 60907
Step 114: 60907 + 539 = 61446
Step 115: 61446 + 539 = 61985
Step 116: 61985 + 539 = 62524
Step 117: 62524 + 539 = 63063
Step 118: 63063 + 539 = 63602
Step 119: 63602 + 539 = 64141
Step 120: 64141 + 539 = 64680
Step 121: 64680 + 539 = 65219
Step 122: 65219 + 539 = 65758
Step 123: 65758 + 539 = 66297
Step 124: 66297 + 539 = 66836
Step 125: 66836 + 539 = 67375
Step 126: 67375 + 539 = 67914
Step 127: 67914 + 539 = 68453
Step 128: 68453 + 539 = 68992
Step 129: 68992 + 539 = 69531
Step 130: 69531 + 539 = 70070
Step 131: 70070 + 539 = 70609
Step 132: 70609 + 539 = 71148
Step 133: 71148 + 539 = 71687
Step 134: 71687 + 539 = 72226
Step 135: 72226 + 539 = 72765
Step 136: 72765 + 539 = 73304
Step 137: 73304 + 539 = 73843
Step 138: 73843 + 539 = 74382
Step 139: 74382 + 539 = 74921
Step 140: 74921 + 539 = 75460

So, 539*140 = 75460