Let's get this math done. We have 853 and we're going to multiply it by 4. This is the same as taking 853 and adding it to itself 4 times.
Step 1: 0 + 853 = 853
Step 2: 853 + 853 = 1706
Step 3: 1706 + 853 = 2559
Step 4: 2559 + 853 = 3412

So, 853*4 = 3412