Alright, let's solve this math problem step by step. First, we have the number 830. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 15. So, we're going to take the number 830 and add it to itself 15 times.
Step 1: 0 + 830 = 830
Step 2: 830 + 830 = 1660
Step 3: 1660 + 830 = 2490
Step 4: 2490 + 830 = 3320
Step 5: 3320 + 830 = 4150
Step 6: 4150 + 830 = 4980
Step 7: 4980 + 830 = 5810
Step 8: 5810 + 830 = 6640
Step 9: 6640 + 830 = 7470
Step 10: 7470 + 830 = 8300
Step 11: 8300 + 830 = 9130
Step 12: 9130 + 830 = 9960
Step 13: 9960 + 830 = 10790
Step 14: 10790 + 830 = 11620
Step 15: 11620 + 830 = 12450

So, 830*15 = 12450