Sure thing, let's get straight to it. We start with 987 and we're going to multiply it by 3, which means adding 987 to itself 3 times.
Step 1: 0 + 987 = 987
Step 2: 987 + 987 = 1974
Step 3: 1974 + 987 = 2961

So, 987*3 = 2961