Let's roll up our sleeves and solve this. We have 725 and we're going to multiply it by 9, essentially adding 725 to itself 9 times.
Step 1: 0 + 725 = 725
Step 2: 725 + 725 = 1450
Step 3: 1450 + 725 = 2175
Step 4: 2175 + 725 = 2900
Step 5: 2900 + 725 = 3625
Step 6: 3625 + 725 = 4350
Step 7: 4350 + 725 = 5075
Step 8: 5075 + 725 = 5800
Step 9: 5800 + 725 = 6525

So, 725*9 = 6525