Let's roll up our sleeves and solve this. We have 89 and we're going to multiply it by 8, essentially adding 89 to itself 8 times.
Step 1: 0 + 89 = 89
Step 2: 89 + 89 = 178
Step 3: 178 + 89 = 267
Step 4: 267 + 89 = 356
Step 5: 356 + 89 = 445
Step 6: 445 + 89 = 534
Step 7: 534 + 89 = 623
Step 8: 623 + 89 = 712

So, 89*8 = 712