<|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 [6, 87, 91, 16], create an equation reaching 245. Use basic arithmetic operations (+, -, *, /) and ensure each number is only used once in your equation. Show your work in <think> </think> tags. Finally, provide the final equation and answer in <answer> </answer> tags, just like the example given in the shape of: <answer> 7 * 8 + 1 = 57 </answer><|im_end|>
<|im_start|>assistant
Let me solve this step by step.
<think>