2187
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Evaluate the expression $a^2\cdot a^5$ if $a= 3$.
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
2187
Evaluate the expression $a^2\cdot a^5$ if $a= 3$.
train