<|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 hare and a tortoise competed in a 5 km race along a straight line, going due North. The hare is five times as fast as the tortoise. The hare mistakenly started running due East. After a while, he realized his mistake, then turned and ran straight to the finish point. He arrived at the same time as the tortoise. Calculate the distance between the hare's turning point and the finish point. Express your answer in kilometers (km), as a whole number. 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
13
A hare and a tortoise competed in a 5 km race along a straight line, going due North. The hare is five times as fast as the tortoise. The hare mistakenly started running due East. After a while, he realized his mistake, then turned and ran straight to the finish point. He arrived at the same time as the tortoise. Calculate the distance between the hare's turning point and the finish point. Express your answer in kilometers (km), as a whole number.
test