Let's roll up our sleeves and solve this. We have 88 and we're going to multiply it by 9, essentially adding 88 to itself 9 times.
Step 1: 0 + 88 = 88
Step 2: 88 + 88 = 176
Step 3: 176 + 88 = 264
Step 4: 264 + 88 = 352
Step 5: 352 + 88 = 440
Step 6: 440 + 88 = 528
Step 7: 528 + 88 = 616
Step 8: 616 + 88 = 704
Step 9: 704 + 88 = 792

So, 88*9 = 792