Let's roll up our sleeves and solve this. We have 707 and we're going to multiply it by 6, essentially adding 707 to itself 6 times.
Step 1: 0 + 707 = 707
Step 2: 707 + 707 = 1414
Step 3: 1414 + 707 = 2121
Step 4: 2121 + 707 = 2828
Step 5: 2828 + 707 = 3535
Step 6: 3535 + 707 = 4242

So, 707*6 = 4242