Let's get this math done. We have 830 and we're going to multiply it by 4. This is the same as taking 830 and adding it to itself 4 times.
Step 1: 0 + 830 = 830
Step 2: 830 + 830 = 1660
Step 3: 1660 + 830 = 2490
Step 4: 2490 + 830 = 3320

So, 830*4 = 3320