Processing a batch of parts, A can do it in 2 days, B can do it in 3 days, a total of (1/2) of the total can be completed, A can do it in 1 day, B can do it in 2 days, a total of (7/24) of the total can be completed, how much can A and B cooperate? days to complete all the work?
加工一批零件，甲做2天，乙做3天，一共可完成总数的(1/2)，甲做1天，乙做2天，一共可完成总数的(7/24)，甲乙合作几天可完成全部工作？
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">7 / 24</gadget>
<output>7/24 = around 0.291667</output>

<gadget id="calculator">(1/2) - (7/24)</gadget>
<output>5/24 = around 0.208333</output>

<gadget id="calculator">1 / (5/24)</gadget>
<output>24/5 = around 4.8</output>

<result>24/5 = around 4.8</result>