Let's get this math done. We have 829 and we're going to multiply it by 3. This is the same as taking 829 and adding it to itself 3 times.
Step 1: 0 + 829 = 829
Step 2: 829 + 829 = 1658
Step 3: 1658 + 829 = 2487

So, 829*3 = 2487