Let's roll up our sleeves and solve this. We have 580 and we're going to multiply it by 3, essentially adding 580 to itself 3 times.
Step 1: 0 + 580 = 580
Step 2: 580 + 580 = 1160
Step 3: 1160 + 580 = 1740

So, 580*3 = 1740