Alright, let's solve this math problem step by step. First, we have the number 351. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 3. So, we're going to take the number 351 and add it to itself 3 times.
Step 1: 0 + 351 = 351
Step 2: 351 + 351 = 702
Step 3: 702 + 351 = 1053

So, 351*3 = 1053