<|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
Given the numbers 15, 47, 83, and 56, construct an equation that equals 100 using basic arithmetic operations +, -, *, / only. Each number can be used only once. Break down the problem into manageable steps, show your work in <think> </think> tags, and finally, return the correct equation in <answer> </answer> tags. For example, if your solution is (a * b) + c - d = 100, make sure you explain your steps to reach (a * b) = [x], (a * b) / c = [y], and (y - d) = 100. Once you have reached the solution, provide the final equation in <answer> </answer> tags: <answer> (expression) </answer>. <|im_end|>
<|im_start|>assistant
Let me solve this step by step.
<think>