Let's roll up our sleeves and solve this. We have 625 and we're going to multiply it by 12, essentially adding 625 to itself 12 times.
Step 1: 0 + 625 = 625
Step 2: 625 + 625 = 1250
Step 3: 1250 + 625 = 1875
Step 4: 1875 + 625 = 2500
Step 5: 2500 + 625 = 3125
Step 6: 3125 + 625 = 3750
Step 7: 3750 + 625 = 4375
Step 8: 4375 + 625 = 5000
Step 9: 5000 + 625 = 5625
Step 10: 5625 + 625 = 6250
Step 11: 6250 + 625 = 6875
Step 12: 6875 + 625 = 7500

So, 625*12 = 7500