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

user
3125
Evaluate the expression $a^3\cdot a^2$ if $a= 5$.
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