OK, let's crack this. We're given 971 and our task is to multiply it by 3. Essentially, we'll be adding 971 to itself 3 times.
Step 1: 0 + 971 = 971
Step 2: 971 + 971 = 1942
Step 3: 1942 + 971 = 2913

So, 971*3 = 2913