Sure thing! We've got 877 and we're gonna multiply it by 4. That's the same as adding 877 to itself 4 times.
Step 1: 0 + 877 = 877
Step 2: 877 + 877 = 1754
Step 3: 1754 + 877 = 2631
Step 4: 2631 + 877 = 3508

So, 877*4 = 3508