Let's roll up our sleeves and solve this. We have 478 and we're going to multiply it by 4, essentially adding 478 to itself 4 times.
Step 1: 0 + 478 = 478
Step 2: 478 + 478 = 956
Step 3: 956 + 478 = 1434
Step 4: 1434 + 478 = 1912

So, 478*4 = 1912