A job, A, B alone need 24 days and 32 days respectively. If A works for 1 day first, then B works for 1 day, and A works for 1 day again...so how many days will it take to complete the job in total?
一项工作，甲，乙单独做分别需要24天和32天．如果由甲先工作1天，乙再工作1天，甲再工作1天…如此轮流工作，那么一共需要几天才能完成这件工作？
<gadget id="calculator">13 * 2</gadget>
<output>26</output>

<gadget id="calculator">1 / 24</gadget>
<output>1/24 = around 0.041667</output>

<gadget id="calculator">1 / 32</gadget>
<output>1/32 = around 0.03125</output>

<gadget id="calculator">(1/24) + (1/32)</gadget>
<output>7/96 = around 0.072917</output>

<gadget id="calculator">13 * (7/96)</gadget>
<output>91/96 = around 0.947917</output>

<gadget id="calculator">1 - (91/96)</gadget>
<output>5/96 = around 0.052083</output>

<gadget id="calculator">(5/96) / (1/24)</gadget>
<output>5/4 = around 1.25</output>

<gadget id="calculator">26 + (5/4)</gadget>
<output>109/4 = around 27.25</output>

<result>109/4 = around 27.25</result>