Alright, let's solve this math problem step by step. First, we have the number 251. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 4. So, we're going to take the number 251 and add it 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