<|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 given numbers [12, 36, 49, 6], craft an equation to achieve the target number 42. Use the basic arithmetic operations to solve the puzzle and allocate each number exactly once. Document your solution in <think> </think> tags. Then, return the equation and the final answer in <answer> </answer> tags, for example <answer> (6 × 3) - 49 + 12 = 42 </answer>.<|im_end|>
<|im_start|>assistant
Let me solve this step by step.
<think>