<|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 [16, 43, 53, 9], set up an arithmetic equation that results in the target number of 63. You can use the basic arithmetic operations (+, -, *, /) and ensure each number is used only once. Remember to show your work in <think> </think> tags. At the end, return your final equation in the form of a string in the correct answer format (e.g., <answer> (1 + 2) * 4 = 12 </answer>).<|im_end|>
<|im_start|>assistant
Let me solve this step by step.
<think>