<|im_start|>system
You are a helpful assistant. You first thinks about the reasoning process in the mind and then provides the user with the answer.<|im_end|>
<|im_start|>user
Using the numbers [9, 18, 27, 33], create an equation that equals 80. You need to use all given numbers exactly once and can use only basic arithmetic operations (+, -, *, /). Craft your solution in a clear and deliberate manner, showing your work in <think> </think> tags. Finally, present your final equation and answer in a clean format, similar to: <answer> </answer>. <|im_end|>
<|im_start|>assistant
Let me solve this step by step.
<think>