Let's roll up our sleeves and solve this. We have 539 and we're going to multiply it by 3, essentially adding 539 to itself 3 times.
Step 1: 0 + 539 = 539
Step 2: 539 + 539 = 1078
Step 3: 1078 + 539 = 1617

So, 539*3 = 1617