Alright, let's solve this math problem step by step. First, we have the number 865. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 18. So, we're going to take the number 865 and add it to itself 18 times.
Step 1: 0 + 865 = 865
Step 2: 865 + 865 = 1730
Step 3: 1730 + 865 = 2595
Step 4: 2595 + 865 = 3460
Step 5: 3460 + 865 = 4325
Step 6: 4325 + 865 = 5190
Step 7: 5190 + 865 = 6055
Step 8: 6055 + 865 = 6920
Step 9: 6920 + 865 = 7785
Step 10: 7785 + 865 = 8650
Step 11: 8650 + 865 = 9515
Step 12: 9515 + 865 = 10380
Step 13: 10380 + 865 = 11245
Step 14: 11245 + 865 = 12110
Step 15: 12110 + 865 = 12975
Step 16: 12975 + 865 = 13840
Step 17: 13840 + 865 = 14705
Step 18: 14705 + 865 = 15570

So, 865*18 = 15570