2
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Solve for $n$, if $9^n\cdot9^n\cdot9^n\cdot9^n=81^4$.
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
2
Solve for $n$, if $9^n\cdot9^n\cdot9^n\cdot9^n=81^4$.
train