Let's roll up our sleeves and solve this. We have 577 and we're going to multiply it by 4, essentially adding 577 to itself 4 times.
Step 1: 0 + 577 = 577
Step 2: 577 + 577 = 1154
Step 3: 1154 + 577 = 1731
Step 4: 1731 + 577 = 2308

So, 577*4 = 2308