Let's roll up our sleeves and solve this. We have 650 and we're going to multiply it by 6, essentially adding 650 to itself 6 times.
Step 1: 0 + 650 = 650
Step 2: 650 + 650 = 1300
Step 3: 1300 + 650 = 1950
Step 4: 1950 + 650 = 2600
Step 5: 2600 + 650 = 3250
Step 6: 3250 + 650 = 3900

So, 650*6 = 3900