OK, let's crack this. We're given 989 and our task is to multiply it by 4. Essentially, we'll be adding 989 to itself 4 times.
Step 1: 0 + 989 = 989
Step 2: 989 + 989 = 1978
Step 3: 1978 + 989 = 2967
Step 4: 2967 + 989 = 3956

So, 989*4 = 3956