Let's get this math done. We have 836 and we're going to multiply it by 10. This is the same as taking 836 and adding it to itself 10 times.
Step 1: 0 + 836 = 836
Step 2: 836 + 836 = 1672
Step 3: 1672 + 836 = 2508
Step 4: 2508 + 836 = 3344
Step 5: 3344 + 836 = 4180
Step 6: 4180 + 836 = 5016
Step 7: 5016 + 836 = 5852
Step 8: 5852 + 836 = 6688
Step 9: 6688 + 836 = 7524
Step 10: 7524 + 836 = 8360

So, 836*10 = 8360