A job can be completed in 3 days and B in 5 days (1/2); A can be completed in 5 days and B can be completed in 3 days (1/3). So, how many days can A and B work together to complete.
一件工作，甲做3天，乙做5天可完成(1/2)；甲做5天，乙做3天可完成(1/3)．那么，甲乙合做多少天可完成．
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">(1/2) + (1/3)</gadget>
<output>5/6 = around 0.833333</output>

<gadget id="calculator">3 + 5</gadget>
<output>8</output>

<gadget id="calculator">(5/6) / 8</gadget>
<output>5/48 = around 0.104167</output>

<gadget id="calculator">1 / (5/48)</gadget>
<output>48/5 = around 9.6</output>

<result>48/5 = around 9.6</result>