Alright, let's solve this math problem step by step. First, we have the number 888. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 15. So, we're going to take the number 888 and add it to itself 15 times.
Step 1: 0 + 888 = 888
Step 2: 888 + 888 = 1776
Step 3: 1776 + 888 = 2664
Step 4: 2664 + 888 = 3552
Step 5: 3552 + 888 = 4440
Step 6: 4440 + 888 = 5328
Step 7: 5328 + 888 = 6216
Step 8: 6216 + 888 = 7104
Step 9: 7104 + 888 = 7992
Step 10: 7992 + 888 = 8880
Step 11: 8880 + 888 = 9768
Step 12: 9768 + 888 = 10656
Step 13: 10656 + 888 = 11544
Step 14: 11544 + 888 = 12432
Step 15: 12432 + 888 = 13320

So, 888*15 = 13320