<|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
 The ratio of pencils, pens, and exercise books in a shop is 14 : 4 : 3. There are 140 pencils and 30 exercise books in the shop. What is the ratio of the number of pens to the number of exercise books? 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
4
The ratio of pencils, pens, and exercise books in a shop is 14 : 4 : 3. There are 140 pencils and 30 exercise books in the shop. What is the ratio of the number of pens to the number of exercise books?
test