Let's roll up our sleeves and solve this. We have 846 and we're going to multiply it by 9, essentially adding 846 to itself 9 times.
Step 1: 0 + 846 = 846
Step 2: 846 + 846 = 1692
Step 3: 1692 + 846 = 2538
Step 4: 2538 + 846 = 3384
Step 5: 3384 + 846 = 4230
Step 6: 4230 + 846 = 5076
Step 7: 5076 + 846 = 5922
Step 8: 5922 + 846 = 6768
Step 9: 6768 + 846 = 7614

So, 846*9 = 7614