Alright, let's solve this math problem step by step. First, we have the number 624. 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 624 and add it to itself 3 times.
Step 1: 0 + 624 = 624
Step 2: 624 + 624 = 1248
Step 3: 1248 + 624 = 1872

So, 624*3 = 1872