<|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 [1, 3, 3, 9], create an equation that equals 45. Use basic arithmetic operations (+, -, *, /) and remember each number can only be used once. Try to build your equation one step at a time. Show your work in <think> </think> tags. Once you have evaluated your equation and corrected any mistakes, return the final equation and answer in <answer> </answer>. For example, if your correct answer follows a pattern like <think> (number1 * number2) + number3 - number4 = 45 </think> then your correct answer should follow this format <answer> (number1 * number2) + number3 - number4 = 45 </answer>.<|im_end|>
<|im_start|>assistant
Let me solve this step by step.
<think>