Alright, let's solve this math problem step by step. First, we have the number 877. 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 877 and add it to itself 3 times.
Step 1: 0 + 877 = 877
Step 2: 877 + 877 = 1754
Step 3: 1754 + 877 = 2631

So, 877*3 = 2631