<|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 farmer has enough food to feed some cows for 50 days. After 10 days, 199.99999999999994 cows run away, and the food was now enough for the same period of 50 days as before. How many cows were there initially? 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
200
A farmer has enough food to feed some cows for 50 days. After 10 days, 199.99999999999994 cows run away, and the food was now enough for the same period of 50 days as before. How many cows were there initially?
test