Let's roll up our sleeves and solve this. We have 104 and we're going to multiply it by 9, essentially adding 104 to itself 9 times.
Step 1: 0 + 104 = 104
Step 2: 104 + 104 = 208
Step 3: 208 + 104 = 312
Step 4: 312 + 104 = 416
Step 5: 416 + 104 = 520
Step 6: 520 + 104 = 624
Step 7: 624 + 104 = 728
Step 8: 728 + 104 = 832
Step 9: 832 + 104 = 936

So, 104*9 = 936