<|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 unit has 7 consecutive parking spaces, and there are 3 different models of cars that need to be parked. If the remaining 4 parking spaces must be consecutive, calculate the number of different parking methods. 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
24
A unit has 7 consecutive parking spaces, and there are 3 different models of cars that need to be parked. If the remaining 4 parking spaces must be consecutive, calculate the number of different parking methods.
test