OK, let's work through this together. We're starting with 830 and we're going to multiply it by 3, which means we add 830 to itself 3 times.
Step 1: 0 + 830 = 830
Step 2: 830 + 830 = 1660
Step 3: 1660 + 830 = 2490

So, 830*3 = 2490