Sure thing! We've got 872 and we're gonna multiply it by 4. That's the same as adding 872 to itself 4 times.
Step 1: 0 + 872 = 872
Step 2: 872 + 872 = 1744
Step 3: 1744 + 872 = 2616
Step 4: 2616 + 872 = 3488

So, 872*4 = 3488