Let's get this math done. We have 790 and we're going to multiply it by 3. This is the same as taking 790 and adding it to itself 3 times.
Step 1: 0 + 790 = 790
Step 2: 790 + 790 = 1580
Step 3: 1580 + 790 = 2370

So, 790*3 = 2370