<|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 [21, 37, 52, 94], create an equation that equals 77. Remember to use each number only once and use the basic arithmetic operations (+, -, *, /). Show your working in <think> </think>, and return the full equation and solution in <answer> </answer> tags, as in <answer> (1 + 2) / 3 = 1 </answer>.<|im_end|>
<|im_start|>assistant
Let me solve this step by step.
<think>