<|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 [4, 77, 31, 12], create an equation that equals 37. You can use basic arithmetic operations (+, -, *, /) and each number can only be used once. Your work should show how you arrived at the target. To start, consider which number you might use as base for your operations. Show your work in <think> </think> tags. And return the final equation and answer in <answer> </answer> tags, for example <answer> (1 + 2) / 3 = 1 </answer>.<|im_end|>
<|im_start|>assistant
Let me solve this step by step.
<think>