<|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 250 m long train is running at a speed of 55 km/hr. It crossed a platform of a certain length in 35.99712023038157 seconds. What is the length of the platform? 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
300
A 250 m long train is running at a speed of 55 km/hr. It crossed a platform of a certain length in 35.99712023038157 seconds. What is the length of the platform?
test