OK, let's work through this together. We're starting with 525 and we're going to multiply it by 140, which means we add 525 to itself 140 times.
Step 1: 0 + 525 = 525
Step 2: 525 + 525 = 1050
Step 3: 1050 + 525 = 1575
Step 4: 1575 + 525 = 2100
Step 5: 2100 + 525 = 2625
Step 6: 2625 + 525 = 3150
Step 7: 3150 + 525 = 3675
Step 8: 3675 + 525 = 4200
Step 9: 4200 + 525 = 4725
Step 10: 4725 + 525 = 5250
Step 11: 5250 + 525 = 5775
Step 12: 5775 + 525 = 6300
Step 13: 6300 + 525 = 6825
Step 14: 6825 + 525 = 7350
Step 15: 7350 + 525 = 7875
Step 16: 7875 + 525 = 8400
Step 17: 8400 + 525 = 8925
Step 18: 8925 + 525 = 9450
Step 19: 9450 + 525 = 9975
Step 20: 9975 + 525 = 10500
Step 21: 10500 + 525 = 11025
Step 22: 11025 + 525 = 11550
Step 23: 11550 + 525 = 12075
Step 24: 12075 + 525 = 12600
Step 25: 12600 + 525 = 13125
Step 26: 13125 + 525 = 13650
Step 27: 13650 + 525 = 14175
Step 28: 14175 + 525 = 14700
Step 29: 14700 + 525 = 15225
Step 30: 15225 + 525 = 15750
Step 31: 15750 + 525 = 16275
Step 32: 16275 + 525 = 16800
Step 33: 16800 + 525 = 17325
Step 34: 17325 + 525 = 17850
Step 35: 17850 + 525 = 18375
Step 36: 18375 + 525 = 18900
Step 37: 18900 + 525 = 19425
Step 38: 19425 + 525 = 19950
Step 39: 19950 + 525 = 20475
Step 40: 20475 + 525 = 21000
Step 41: 21000 + 525 = 21525
Step 42: 21525 + 525 = 22050
Step 43: 22050 + 525 = 22575
Step 44: 22575 + 525 = 23100
Step 45: 23100 + 525 = 23625
Step 46: 23625 + 525 = 24150
Step 47: 24150 + 525 = 24675
Step 48: 24675 + 525 = 25200
Step 49: 25200 + 525 = 25725
Step 50: 25725 + 525 = 26250
Step 51: 26250 + 525 = 26775
Step 52: 26775 + 525 = 27300
Step 53: 27300 + 525 = 27825
Step 54: 27825 + 525 = 28350
Step 55: 28350 + 525 = 28875
Step 56: 28875 + 525 = 29400
Step 57: 29400 + 525 = 29925
Step 58: 29925 + 525 = 30450
Step 59: 30450 + 525 = 30975
Step 60: 30975 + 525 = 31500
Step 61: 31500 + 525 = 32025
Step 62: 32025 + 525 = 32550
Step 63: 32550 + 525 = 33075
Step 64: 33075 + 525 = 33600
Step 65: 33600 + 525 = 34125
Step 66: 34125 + 525 = 34650
Step 67: 34650 + 525 = 35175
Step 68: 35175 + 525 = 35700
Step 69: 35700 + 525 = 36225
Step 70: 36225 + 525 = 36750
Step 71: 36750 + 525 = 37275
Step 72: 37275 + 525 = 37800
Step 73: 37800 + 525 = 38325
Step 74: 38325 + 525 = 38850
Step 75: 38850 + 525 = 39375
Step 76: 39375 + 525 = 39900
Step 77: 39900 + 525 = 40425
Step 78: 40425 + 525 = 40950
Step 79: 40950 + 525 = 41475
Step 80: 41475 + 525 = 42000
Step 81: 42000 + 525 = 42525
Step 82: 42525 + 525 = 43050
Step 83: 43050 + 525 = 43575
Step 84: 43575 + 525 = 44100
Step 85: 44100 + 525 = 44625
Step 86: 44625 + 525 = 45150
Step 87: 45150 + 525 = 45675
Step 88: 45675 + 525 = 46200
Step 89: 46200 + 525 = 46725
Step 90: 46725 + 525 = 47250
Step 91: 47250 + 525 = 47775
Step 92: 47775 + 525 = 48300
Step 93: 48300 + 525 = 48825
Step 94: 48825 + 525 = 49350
Step 95: 49350 + 525 = 49875
Step 96: 49875 + 525 = 50400
Step 97: 50400 + 525 = 50925
Step 98: 50925 + 525 = 51450
Step 99: 51450 + 525 = 51975
Step 100: 51975 + 525 = 52500
Step 101: 52500 + 525 = 53025
Step 102: 53025 + 525 = 53550
Step 103: 53550 + 525 = 54075
Step 104: 54075 + 525 = 54600
Step 105: 54600 + 525 = 55125
Step 106: 55125 + 525 = 55650
Step 107: 55650 + 525 = 56175
Step 108: 56175 + 525 = 56700
Step 109: 56700 + 525 = 57225
Step 110: 57225 + 525 = 57750
Step 111: 57750 + 525 = 58275
Step 112: 58275 + 525 = 58800
Step 113: 58800 + 525 = 59325
Step 114: 59325 + 525 = 59850
Step 115: 59850 + 525 = 60375
Step 116: 60375 + 525 = 60900
Step 117: 60900 + 525 = 61425
Step 118: 61425 + 525 = 61950
Step 119: 61950 + 525 = 62475
Step 120: 62475 + 525 = 63000
Step 121: 63000 + 525 = 63525
Step 122: 63525 + 525 = 64050
Step 123: 64050 + 525 = 64575
Step 124: 64575 + 525 = 65100
Step 125: 65100 + 525 = 65625
Step 126: 65625 + 525 = 66150
Step 127: 66150 + 525 = 66675
Step 128: 66675 + 525 = 67200
Step 129: 67200 + 525 = 67725
Step 130: 67725 + 525 = 68250
Step 131: 68250 + 525 = 68775
Step 132: 68775 + 525 = 69300
Step 133: 69300 + 525 = 69825
Step 134: 69825 + 525 = 70350
Step 135: 70350 + 525 = 70875
Step 136: 70875 + 525 = 71400
Step 137: 71400 + 525 = 71925
Step 138: 71925 + 525 = 72450
Step 139: 72450 + 525 = 72975
Step 140: 72975 + 525 = 73500

So, 525*140 = 73500