Square tiles measuring 4 inches on each side will be used to tile a 1-foot by 1-foot area. How many of these tiles are needed?
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Square tiles measuring 4 inches on each side will be used to tile a 1-foot by 1-foot area. How many of these tiles are needed?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
9
Square tiles measuring 4 inches on each side will be used to tile a 1-foot by 1-foot area. How many of these tiles are needed?
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