<|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 [13, 55, 9, 7], create an equation that equals 57. You can use basic arithmetic operations (+, -, *, /) and each number can only be used once. Show your work in <think> </think> tags. Then provide at least four different ways to reach the target number and present them in the following format: <answer> [solution 1] </answer>, <answer> [solution 2] </answer>, <answer> [solution 3] </answer>, <answer> [solution 4] </answer>. Get ready to demonstrate your Countdown Game skills!<|im_end|>
<|im_start|>assistant
Let me solve this step by step.
<think>