You are given the numbers 23, 27, 49, and 9. Use them combined with arithmetic operators (+, -, *, /), you can use each number only once, and any order of mathematical operations, to create an equation that equals 63. Show your work step-by-step in <think> </think> tags. 
    Return your final work and answer in <answer> </answer> tags, for example <answer> 9 * 7 = 63 </answer>.