OK, let's crack this. We're given 925 and our task is to multiply it by 84. Essentially, we'll be adding 925 to itself 84 times.
Step 1: 0 + 925 = 925
Step 2: 925 + 925 = 1850
Step 3: 1850 + 925 = 2775
Step 4: 2775 + 925 = 3700
Step 5: 3700 + 925 = 4625
Step 6: 4625 + 925 = 5550
Step 7: 5550 + 925 = 6475
Step 8: 6475 + 925 = 7400
Step 9: 7400 + 925 = 8325
Step 10: 8325 + 925 = 9250
Step 11: 9250 + 925 = 10175
Step 12: 10175 + 925 = 11100
Step 13: 11100 + 925 = 12025
Step 14: 12025 + 925 = 12950
Step 15: 12950 + 925 = 13875
Step 16: 13875 + 925 = 14800
Step 17: 14800 + 925 = 15725
Step 18: 15725 + 925 = 16650
Step 19: 16650 + 925 = 17575
Step 20: 17575 + 925 = 18500
Step 21: 18500 + 925 = 19425
Step 22: 19425 + 925 = 20350
Step 23: 20350 + 925 = 21275
Step 24: 21275 + 925 = 22200
Step 25: 22200 + 925 = 23125
Step 26: 23125 + 925 = 24050
Step 27: 24050 + 925 = 24975
Step 28: 24975 + 925 = 25900
Step 29: 25900 + 925 = 26825
Step 30: 26825 + 925 = 27750
Step 31: 27750 + 925 = 28675
Step 32: 28675 + 925 = 29600
Step 33: 29600 + 925 = 30525
Step 34: 30525 + 925 = 31450
Step 35: 31450 + 925 = 32375
Step 36: 32375 + 925 = 33300
Step 37: 33300 + 925 = 34225
Step 38: 34225 + 925 = 35150
Step 39: 35150 + 925 = 36075
Step 40: 36075 + 925 = 37000
Step 41: 37000 + 925 = 37925
Step 42: 37925 + 925 = 38850
Step 43: 38850 + 925 = 39775
Step 44: 39775 + 925 = 40700
Step 45: 40700 + 925 = 41625
Step 46: 41625 + 925 = 42550
Step 47: 42550 + 925 = 43475
Step 48: 43475 + 925 = 44400
Step 49: 44400 + 925 = 45325
Step 50: 45325 + 925 = 46250
Step 51: 46250 + 925 = 47175
Step 52: 47175 + 925 = 48100
Step 53: 48100 + 925 = 49025
Step 54: 49025 + 925 = 49950
Step 55: 49950 + 925 = 50875
Step 56: 50875 + 925 = 51800
Step 57: 51800 + 925 = 52725
Step 58: 52725 + 925 = 53650
Step 59: 53650 + 925 = 54575
Step 60: 54575 + 925 = 55500
Step 61: 55500 + 925 = 56425
Step 62: 56425 + 925 = 57350
Step 63: 57350 + 925 = 58275
Step 64: 58275 + 925 = 59200
Step 65: 59200 + 925 = 60125
Step 66: 60125 + 925 = 61050
Step 67: 61050 + 925 = 61975
Step 68: 61975 + 925 = 62900
Step 69: 62900 + 925 = 63825
Step 70: 63825 + 925 = 64750
Step 71: 64750 + 925 = 65675
Step 72: 65675 + 925 = 66600
Step 73: 66600 + 925 = 67525
Step 74: 67525 + 925 = 68450
Step 75: 68450 + 925 = 69375
Step 76: 69375 + 925 = 70300
Step 77: 70300 + 925 = 71225
Step 78: 71225 + 925 = 72150
Step 79: 72150 + 925 = 73075
Step 80: 73075 + 925 = 74000
Step 81: 74000 + 925 = 74925
Step 82: 74925 + 925 = 75850
Step 83: 75850 + 925 = 76775
Step 84: 76775 + 925 = 77700

So, 925*84 = 77700