Without delay, let's solve this. We've got 251 and we will be multiplying it by 4, that is, adding 251 to itself 4 times.
Step 1: 0 + 251 = 251
Step 2: 251 + 251 = 502
Step 3: 502 + 251 = 753
Step 4: 753 + 251 = 1004

So, 251*4 = 1004