<|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
In this Countdown Game, your task is to use the numbers [23, -30, 19, -1, -12, 23], along with the basic arithmetic operations (+, -, *, /), to create an equation that results in 231. Show your work in <think> </think> tags and provide the final equation (the correct arrangement of nums and arithmetic symbols) in <answer> </answer> tags, for example <answer> (13 * 23) / (-12) - 1 = 231 </answer>.<|im_end|>
<|im_start|>assistant
Let me solve this step by step.
<think>