Let's roll up our sleeves and solve this. We have 654 and we're going to multiply it by 4, essentially adding 654 to itself 4 times.
Step 1: 0 + 654 = 654
Step 2: 654 + 654 = 1308
Step 3: 1308 + 654 = 1962
Step 4: 1962 + 654 = 2616

So, 654*4 = 2616