He has to climb 9*10=<<9*10=90>>90 feet

That means he needs to climb 90*12=<<90*12=1080>>1080 inches

That means he needs to climb 1080/18=<<1080/18=60>>60 stairs

# Answer

60
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
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?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
60
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?
train