Let's get this math done. We have 365 and we're going to multiply it by 15. This is the same as taking 365 and adding it to itself 15 times.
Step 1: 0 + 365 = 365
Step 2: 365 + 365 = 730
Step 3: 730 + 365 = 1095
Step 4: 1095 + 365 = 1460
Step 5: 1460 + 365 = 1825
Step 6: 1825 + 365 = 2190
Step 7: 2190 + 365 = 2555
Step 8: 2555 + 365 = 2920
Step 9: 2920 + 365 = 3285
Step 10: 3285 + 365 = 3650
Step 11: 3650 + 365 = 4015
Step 12: 4015 + 365 = 4380
Step 13: 4380 + 365 = 4745
Step 14: 4745 + 365 = 5110
Step 15: 5110 + 365 = 5475

So, 365*15 = 5475