Let's get this math done. We have 836 and we're going to multiply it by 16. This is the same as taking 836 and adding it to itself 16 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
Step 11: 8360 + 836 = 9196
Step 12: 9196 + 836 = 10032
Step 13: 10032 + 836 = 10868
Step 14: 10868 + 836 = 11704
Step 15: 11704 + 836 = 12540
Step 16: 12540 + 836 = 13376

So, 836*16 = 13376