Sure thing, let's get straight to it. We start with 250 and we're going to multiply it by 64, which means adding 250 to itself 64 times.
Step 1: 0 + 250 = 250
Step 2: 250 + 250 = 500
Step 3: 500 + 250 = 750
Step 4: 750 + 250 = 1000
Step 5: 1000 + 250 = 1250
Step 6: 1250 + 250 = 1500
Step 7: 1500 + 250 = 1750
Step 8: 1750 + 250 = 2000
Step 9: 2000 + 250 = 2250
Step 10: 2250 + 250 = 2500
Step 11: 2500 + 250 = 2750
Step 12: 2750 + 250 = 3000
Step 13: 3000 + 250 = 3250
Step 14: 3250 + 250 = 3500
Step 15: 3500 + 250 = 3750
Step 16: 3750 + 250 = 4000
Step 17: 4000 + 250 = 4250
Step 18: 4250 + 250 = 4500
Step 19: 4500 + 250 = 4750
Step 20: 4750 + 250 = 5000
Step 21: 5000 + 250 = 5250
Step 22: 5250 + 250 = 5500
Step 23: 5500 + 250 = 5750
Step 24: 5750 + 250 = 6000
Step 25: 6000 + 250 = 6250
Step 26: 6250 + 250 = 6500
Step 27: 6500 + 250 = 6750
Step 28: 6750 + 250 = 7000
Step 29: 7000 + 250 = 7250
Step 30: 7250 + 250 = 7500
Step 31: 7500 + 250 = 7750
Step 32: 7750 + 250 = 8000
Step 33: 8000 + 250 = 8250
Step 34: 8250 + 250 = 8500
Step 35: 8500 + 250 = 8750
Step 36: 8750 + 250 = 9000
Step 37: 9000 + 250 = 9250
Step 38: 9250 + 250 = 9500
Step 39: 9500 + 250 = 9750
Step 40: 9750 + 250 = 10000
Step 41: 10000 + 250 = 10250
Step 42: 10250 + 250 = 10500
Step 43: 10500 + 250 = 10750
Step 44: 10750 + 250 = 11000
Step 45: 11000 + 250 = 11250
Step 46: 11250 + 250 = 11500
Step 47: 11500 + 250 = 11750
Step 48: 11750 + 250 = 12000
Step 49: 12000 + 250 = 12250
Step 50: 12250 + 250 = 12500
Step 51: 12500 + 250 = 12750
Step 52: 12750 + 250 = 13000
Step 53: 13000 + 250 = 13250
Step 54: 13250 + 250 = 13500
Step 55: 13500 + 250 = 13750
Step 56: 13750 + 250 = 14000
Step 57: 14000 + 250 = 14250
Step 58: 14250 + 250 = 14500
Step 59: 14500 + 250 = 14750
Step 60: 14750 + 250 = 15000
Step 61: 15000 + 250 = 15250
Step 62: 15250 + 250 = 15500
Step 63: 15500 + 250 = 15750
Step 64: 15750 + 250 = 16000

So, 250*64 = 16000