Let's roll up our sleeves and solve this. We have 432 and we're going to multiply it by 4, essentially adding 432 to itself 4 times.
Step 1: 0 + 432 = 432
Step 2: 432 + 432 = 864
Step 3: 864 + 432 = 1296
Step 4: 1296 + 432 = 1728

So, 432*4 = 1728