<|im_start|>system
You are a helpful assistant. You first think about the reasoning process in the mind and then provide the user with the answer. You should try to truely solve the question by yourself without cheating.  <|im_end|>
<|im_start|>user
 A man engaged a servant on the condition that he would pay him Rs. 800 and a uniform after one year of service. The servant served for a certain period and received a uniform and Rs. 400. How long did the servant serve? Show your work in <think> </think> tags. And return the final answer in <answer> </answer> tags.<|im_end|>
<|im_start|>assistant
Let me solve this step by step.
<think>
user
6
A man engaged a servant on the condition that he would pay him Rs. 800 and a uniform after one year of service. The servant served for a certain period and received a uniform and Rs. 400. How long did the servant serve?
test