<|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
 Find the area of a parallelogram with the length of one diagonal being 30 meters, the angle between the diagonals being α, and the altitude drawn to that diagonal being 20 meters. 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
600
Find the area of a parallelogram with the length of one diagonal being 30 meters, the angle between the diagonals being α, and the altitude drawn to that diagonal being 20 meters.
test