<|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
Starting with the numbers [20, 77, 6, 73], find an equation that equals 67 using basic arithmetic operations (+, -, *, /) and each number can only be used once. Show your working in <think> </think> tags and provide the final equation and answer in <answer> </answer> format in the same template as the example final answer, for example <answer> (3 - 1) * 7 = 14 </answer> may not be correct for this format. Make sure to meet the requirements of the task and provide your solution within the specified format.<|im_end|>
<|im_start|>assistant
Let me solve this step by step.
<think>