Let's roll up our sleeves and solve this. We have 725 and we're going to multiply it by 3, essentially adding 725 to itself 3 times.
Step 1: 0 + 725 = 725
Step 2: 725 + 725 = 1450
Step 3: 1450 + 725 = 2175

So, 725*3 = 2175