How many cubic feet are in three cubic yards?
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
How many cubic feet are in three cubic yards?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
81
How many cubic feet are in three cubic yards?
train