Sure thing, let's get straight to it. We start with 663 and we're going to multiply it by 5, which means adding 663 to itself 5 times.
Step 1: 0 + 663 = 663
Step 2: 663 + 663 = 1326
Step 3: 1326 + 663 = 1989
Step 4: 1989 + 663 = 2652
Step 5: 2652 + 663 = 3315

So, 663*5 = 3315