<|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 five-digit number is given. If a seven is prepended to the number, the resulting six-digit number will be 5 times larger than the six-digit number with the seven appended at the end. Find this five-digit 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
14285
A five-digit number is given. If a seven is prepended to the number, the resulting six-digit number will be 5 times larger than the six-digit number with the seven appended at the end. Find this five-digit number.
test