<|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
 Arrange the digits from 0 to 9 into a ten-digit number where the first digit is not zero and all digits are unique. How many such ten-digit numbers are divisible by 99? 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
285120
Arrange the digits from 0 to 9 into a ten-digit number where the first digit is not zero and all digits are unique. How many such ten-digit numbers are divisible by 99?
test