Alright, let's solve this math problem step by step. First, we have the number 515. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 24. So, we're going to take the number 515 and add it to itself 24 times.
Step 1: 0 + 515 = 515
Step 2: 515 + 515 = 1030
Step 3: 1030 + 515 = 1545
Step 4: 1545 + 515 = 2060
Step 5: 2060 + 515 = 2575
Step 6: 2575 + 515 = 3090
Step 7: 3090 + 515 = 3605
Step 8: 3605 + 515 = 4120
Step 9: 4120 + 515 = 4635
Step 10: 4635 + 515 = 5150
Step 11: 5150 + 515 = 5665
Step 12: 5665 + 515 = 6180
Step 13: 6180 + 515 = 6695
Step 14: 6695 + 515 = 7210
Step 15: 7210 + 515 = 7725
Step 16: 7725 + 515 = 8240
Step 17: 8240 + 515 = 8755
Step 18: 8755 + 515 = 9270
Step 19: 9270 + 515 = 9785
Step 20: 9785 + 515 = 10300
Step 21: 10300 + 515 = 10815
Step 22: 10815 + 515 = 11330
Step 23: 11330 + 515 = 11845
Step 24: 11845 + 515 = 12360

So, 515*24 = 12360