OK, let's crack this. We're given 107 and our task is to multiply it by 9. Essentially, we'll be adding 107 to itself 9 times.
Step 1: 0 + 107 = 107
Step 2: 107 + 107 = 214
Step 3: 214 + 107 = 321
Step 4: 321 + 107 = 428
Step 5: 428 + 107 = 535
Step 6: 535 + 107 = 642
Step 7: 642 + 107 = 749
Step 8: 749 + 107 = 856
Step 9: 856 + 107 = 963

So, 107*9 = 963