solution: We have $2^6=64$, so $\log_2 64 = \boxed{6}$.
prompt.content: <|im_start|>system
  You are a helpful assistant.<|im_end|>
  <|im_start|>user
  Evaluate $\log_264$.
  Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
  <|im_start|>assistant
  
prompt.role: user
extra_info.answer: 6
extra_info.question: Evaluate $\log_264$.
extra_info.split: test