Alright, let's solve this math problem step by step. First, we have the number 366. 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 366 and add it to itself 15 times.
Step 1: 0 + 366 = 366
Step 2: 366 + 366 = 732
Step 3: 732 + 366 = 1098
Step 4: 1098 + 366 = 1464
Step 5: 1464 + 366 = 1830
Step 6: 1830 + 366 = 2196
Step 7: 2196 + 366 = 2562
Step 8: 2562 + 366 = 2928
Step 9: 2928 + 366 = 3294
Step 10: 3294 + 366 = 3660
Step 11: 3660 + 366 = 4026
Step 12: 4026 + 366 = 4392
Step 13: 4392 + 366 = 4758
Step 14: 4758 + 366 = 5124
Step 15: 5124 + 366 = 5490

So, 366*15 = 5490