OK, let's work through this together. We're starting with 580 and we're going to multiply it by 18, which means we add 580 to itself 18 times.
Step 1: 0 + 580 = 580
Step 2: 580 + 580 = 1160
Step 3: 1160 + 580 = 1740
Step 4: 1740 + 580 = 2320
Step 5: 2320 + 580 = 2900
Step 6: 2900 + 580 = 3480
Step 7: 3480 + 580 = 4060
Step 8: 4060 + 580 = 4640
Step 9: 4640 + 580 = 5220
Step 10: 5220 + 580 = 5800
Step 11: 5800 + 580 = 6380
Step 12: 6380 + 580 = 6960
Step 13: 6960 + 580 = 7540
Step 14: 7540 + 580 = 8120
Step 15: 8120 + 580 = 8700
Step 16: 8700 + 580 = 9280
Step 17: 9280 + 580 = 9860
Step 18: 9860 + 580 = 10440

So, 580*18 = 10440