project can be completed in 3 days for A and 5 days for B (1/2), 5 days for A and 3 days for B (1/3). How many days will it take for A and B to work together?
一项工程，甲干3天，乙干5天可以完成(1/2)，甲干5天，乙干3天可以完成(1/3)．甲、乙合干需几天完成？
<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">(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>