Let's get this math done. We have 998 and we're going to multiply it by 4. This is the same as taking 998 and adding it to itself 4 times.
Step 1: 0 + 998 = 998
Step 2: 998 + 998 = 1996
Step 3: 1996 + 998 = 2994
Step 4: 2994 + 998 = 3992

So, 998*4 = 3992