Evaluate $\log_7\sqrt7$.
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Evaluate $\log_7\sqrt7$.
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
\frac12
Evaluate $\log_7\sqrt7$.
train