OK, let's crack this. We're given 63 and our task is to multiply it by 4. Essentially, we'll be adding 63 to itself 4 times.
Step 1: 0 + 63 = 63
Step 2: 63 + 63 = 126
Step 3: 126 + 63 = 189
Step 4: 189 + 63 = 252

So, 63*4 = 252