OK, let's crack this. We're given 109 and our task is to multiply it by 8. Essentially, we'll be adding 109 to itself 8 times.
Step 1: 0 + 109 = 109
Step 2: 109 + 109 = 218
Step 3: 218 + 109 = 327
Step 4: 327 + 109 = 436
Step 5: 436 + 109 = 545
Step 6: 545 + 109 = 654
Step 7: 654 + 109 = 763
Step 8: 763 + 109 = 872

So, 109*8 = 872