If A works in 3 days, B can complete half of the project in 5 days, and A can complete 1/3 of the project in 5 days and B in 3 days. Ask A and B how many days it will take to complete the whole work together.
一项工程，甲做3天，乙做5天可以完成工程的一半，甲做5天，乙做3天可以完成工程的三分之一．问甲、乙合作需耍多少天完成整项工作．
<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>