OK, let's work through this together. We're starting with 853 and we're going to multiply it by 7, which means we add 853 to itself 7 times.
Step 1: 0 + 853 = 853
Step 2: 853 + 853 = 1706
Step 3: 1706 + 853 = 2559
Step 4: 2559 + 853 = 3412
Step 5: 3412 + 853 = 4265
Step 6: 4265 + 853 = 5118
Step 7: 5118 + 853 = 5971

So, 853*7 = 5971