OK, let's crack this. We're given 778 and our task is to multiply it by 3. Essentially, we'll be adding 778 to itself 3 times.
Step 1: 0 + 778 = 778
Step 2: 778 + 778 = 1556
Step 3: 1556 + 778 = 2334

So, 778*3 = 2334