What is $50\%$ of $200\%$ of $10$?
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
What is $50\%$ of $200\%$ of $10$?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
10
What is $50\%$ of $200\%$ of $10$?
train