<|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 [28, 15, 73, 3], find a way to create an equation that equals 213. Use the basic operations of addition, subtraction, multiplication, and division, and each number can only be used once. Show your work in <think> </think> tags. Finally, return the final equation and the answer in the following format: <answer> </answer>, for example <answer> (28 + 15 + 3) * 7 = 213 </answer>.<|im_end|>
<|im_start|>assistant
Let me solve this step by step.
<think>