Let's roll up our sleeves and solve this. We have 486 and we're going to multiply it by 4, essentially adding 486 to itself 4 times.
Step 1: 0 + 486 = 486
Step 2: 486 + 486 = 972
Step 3: 972 + 486 = 1458
Step 4: 1458 + 486 = 1944

So, 486*4 = 1944