John climbs up 9 flights of stairs. Each flight is 10 feet. If each step is 18 inches, how many steps does he climb up? Think carefully first, then make a decision:
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He has to climb 9 * 10 = 90 feet. That means he needs to climb 90 * 12 = 1080 inches. That means he needs to climb 1080 / 18 = 60 stairs. So, the answer is 60.
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