<|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 survey was sent to some customers, 7 of whom responded. Then the survey was redesigned and sent to another 63 customers, 9 of whom responded. The response rate increased by approximately 5% from the original survey to the redesigned survey. How many customers were sent the original survey? 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
75
A survey was sent to some customers, 7 of whom responded. Then the survey was redesigned and sent to another 63 customers, 9 of whom responded. The response rate increased by approximately 5% from the original survey to the redesigned survey. How many customers were sent the original survey?
test