<|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 [19, 54, 2, 87], form an equation that results in the target number 107. Use basic arithmetic operations (+, -, *, /) to reach this number. Each number can only be used once. Since this is a challenging puzzle, your work in <think> </think> tags is very helpful. Provide the final equation and solution in <answer> </answer> tags, for example: <answer> (2 + 19) * 54 = 107 </answer>.<|im_end|>
<|im_start|>assistant
Let me solve this step by step.
<think>