Let's roll up our sleeves and solve this. We have 531 and we're going to multiply it by 3, essentially adding 531 to itself 3 times.
Step 1: 0 + 531 = 531
Step 2: 531 + 531 = 1062
Step 3: 1062 + 531 = 1593

So, 531*3 = 1593