Let's roll up our sleeves and solve this. We have 425 and we're going to multiply it by 73, essentially adding 425 to itself 73 times.
Step 1: 0 + 425 = 425
Step 2: 425 + 425 = 850
Step 3: 850 + 425 = 1275
Step 4: 1275 + 425 = 1700
Step 5: 1700 + 425 = 2125
Step 6: 2125 + 425 = 2550
Step 7: 2550 + 425 = 2975
Step 8: 2975 + 425 = 3400
Step 9: 3400 + 425 = 3825
Step 10: 3825 + 425 = 4250
Step 11: 4250 + 425 = 4675
Step 12: 4675 + 425 = 5100
Step 13: 5100 + 425 = 5525
Step 14: 5525 + 425 = 5950
Step 15: 5950 + 425 = 6375
Step 16: 6375 + 425 = 6800
Step 17: 6800 + 425 = 7225
Step 18: 7225 + 425 = 7650
Step 19: 7650 + 425 = 8075
Step 20: 8075 + 425 = 8500
Step 21: 8500 + 425 = 8925
Step 22: 8925 + 425 = 9350
Step 23: 9350 + 425 = 9775
Step 24: 9775 + 425 = 10200
Step 25: 10200 + 425 = 10625
Step 26: 10625 + 425 = 11050
Step 27: 11050 + 425 = 11475
Step 28: 11475 + 425 = 11900
Step 29: 11900 + 425 = 12325
Step 30: 12325 + 425 = 12750
Step 31: 12750 + 425 = 13175
Step 32: 13175 + 425 = 13600
Step 33: 13600 + 425 = 14025
Step 34: 14025 + 425 = 14450
Step 35: 14450 + 425 = 14875
Step 36: 14875 + 425 = 15300
Step 37: 15300 + 425 = 15725
Step 38: 15725 + 425 = 16150
Step 39: 16150 + 425 = 16575
Step 40: 16575 + 425 = 17000
Step 41: 17000 + 425 = 17425
Step 42: 17425 + 425 = 17850
Step 43: 17850 + 425 = 18275
Step 44: 18275 + 425 = 18700
Step 45: 18700 + 425 = 19125
Step 46: 19125 + 425 = 19550
Step 47: 19550 + 425 = 19975
Step 48: 19975 + 425 = 20400
Step 49: 20400 + 425 = 20825
Step 50: 20825 + 425 = 21250
Step 51: 21250 + 425 = 21675
Step 52: 21675 + 425 = 22100
Step 53: 22100 + 425 = 22525
Step 54: 22525 + 425 = 22950
Step 55: 22950 + 425 = 23375
Step 56: 23375 + 425 = 23800
Step 57: 23800 + 425 = 24225
Step 58: 24225 + 425 = 24650
Step 59: 24650 + 425 = 25075
Step 60: 25075 + 425 = 25500
Step 61: 25500 + 425 = 25925
Step 62: 25925 + 425 = 26350
Step 63: 26350 + 425 = 26775
Step 64: 26775 + 425 = 27200
Step 65: 27200 + 425 = 27625
Step 66: 27625 + 425 = 28050
Step 67: 28050 + 425 = 28475
Step 68: 28475 + 425 = 28900
Step 69: 28900 + 425 = 29325
Step 70: 29325 + 425 = 29750
Step 71: 29750 + 425 = 30175
Step 72: 30175 + 425 = 30600
Step 73: 30600 + 425 = 31025

So, 425*73 = 31025