Let's roll up our sleeves and solve this. We have 710 and we're going to multiply it by 3, essentially adding 710 to itself 3 times.
Step 1: 0 + 710 = 710
Step 2: 710 + 710 = 1420
Step 3: 1420 + 710 = 2130

So, 710*3 = 2130