<|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
 Currently, there are 12 different types of products placed on a shelf, arranged with 4 on the upper layer and 8 on the lower layer. Now, if 2 products are to be moved from the lower layer to the upper layer, and the relative order of the other products remains unchanged, then the number of different ways to adjust the products is $\_\_\_\_\_\_\_$ (answer in numbers). 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
28
Currently, there are 12 different types of products placed on a shelf, arranged with 4 on the upper layer and 8 on the lower layer. Now, if 2 products are to be moved from the lower layer to the upper layer, and the relative order of the other products remains unchanged, then the number of different ways to adjust the products is $\_\_\_\_\_\_\_$ (answer in numbers).
test