<|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 person decided to build a house in some days. He employed 100 men in the beginning and 100 more after 10 days and completed the construction in the stipulated time. If he had not employed the additional men, the construction would have been finished 90 days behind schedule. In how many days did he plan to build the house? 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
110
A person decided to build a house in some days. He employed 100 men in the beginning and 100 more after 10 days and completed the construction in the stipulated time. If he had not employed the additional men, the construction would have been finished 90 days behind schedule. In how many days did he plan to build the house?
test