Let's roll up our sleeves and solve this. We have 650 and we're going to multiply it by 66, essentially adding 650 to itself 66 times.
Step 1: 0 + 650 = 650
Step 2: 650 + 650 = 1300
Step 3: 1300 + 650 = 1950
Step 4: 1950 + 650 = 2600
Step 5: 2600 + 650 = 3250
Step 6: 3250 + 650 = 3900
Step 7: 3900 + 650 = 4550
Step 8: 4550 + 650 = 5200
Step 9: 5200 + 650 = 5850
Step 10: 5850 + 650 = 6500
Step 11: 6500 + 650 = 7150
Step 12: 7150 + 650 = 7800
Step 13: 7800 + 650 = 8450
Step 14: 8450 + 650 = 9100
Step 15: 9100 + 650 = 9750
Step 16: 9750 + 650 = 10400
Step 17: 10400 + 650 = 11050
Step 18: 11050 + 650 = 11700
Step 19: 11700 + 650 = 12350
Step 20: 12350 + 650 = 13000
Step 21: 13000 + 650 = 13650
Step 22: 13650 + 650 = 14300
Step 23: 14300 + 650 = 14950
Step 24: 14950 + 650 = 15600
Step 25: 15600 + 650 = 16250
Step 26: 16250 + 650 = 16900
Step 27: 16900 + 650 = 17550
Step 28: 17550 + 650 = 18200
Step 29: 18200 + 650 = 18850
Step 30: 18850 + 650 = 19500
Step 31: 19500 + 650 = 20150
Step 32: 20150 + 650 = 20800
Step 33: 20800 + 650 = 21450
Step 34: 21450 + 650 = 22100
Step 35: 22100 + 650 = 22750
Step 36: 22750 + 650 = 23400
Step 37: 23400 + 650 = 24050
Step 38: 24050 + 650 = 24700
Step 39: 24700 + 650 = 25350
Step 40: 25350 + 650 = 26000
Step 41: 26000 + 650 = 26650
Step 42: 26650 + 650 = 27300
Step 43: 27300 + 650 = 27950
Step 44: 27950 + 650 = 28600
Step 45: 28600 + 650 = 29250
Step 46: 29250 + 650 = 29900
Step 47: 29900 + 650 = 30550
Step 48: 30550 + 650 = 31200
Step 49: 31200 + 650 = 31850
Step 50: 31850 + 650 = 32500
Step 51: 32500 + 650 = 33150
Step 52: 33150 + 650 = 33800
Step 53: 33800 + 650 = 34450
Step 54: 34450 + 650 = 35100
Step 55: 35100 + 650 = 35750
Step 56: 35750 + 650 = 36400
Step 57: 36400 + 650 = 37050
Step 58: 37050 + 650 = 37700
Step 59: 37700 + 650 = 38350
Step 60: 38350 + 650 = 39000
Step 61: 39000 + 650 = 39650
Step 62: 39650 + 650 = 40300
Step 63: 40300 + 650 = 40950
Step 64: 40950 + 650 = 41600
Step 65: 41600 + 650 = 42250
Step 66: 42250 + 650 = 42900

So, 650*66 = 42900