A tree is now 12 feet tall and grows 18 inches a year. In how many years will the tree be 36 feet tall?
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
A tree is now 12 feet tall and grows 18 inches a year. In how many years will the tree be 36 feet tall?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
16
A tree is now 12 feet tall and grows 18 inches a year. In how many years will the tree be 36 feet tall?
train