OK, let's crack this. We're given 867 and our task is to multiply it by 3. Essentially, we'll be adding 867 to itself 3 times.
Step 1: 0 + 867 = 867
Step 2: 867 + 867 = 1734
Step 3: 1734 + 867 = 2601

So, 867*3 = 2601