Let's get this math done. We have 243 and we're going to multiply it by 4. This is the same as taking 243 and adding it to itself 4 times.
Step 1: 0 + 243 = 243
Step 2: 243 + 243 = 486
Step 3: 486 + 243 = 729
Step 4: 729 + 243 = 972

So, 243*4 = 972