A pile of goods can be transported by car A alone (1/2) hour, car B alone (1/3) hour, and two cars together, how many hours can it be transported?
一堆货，甲车独运(1/2)小时完成，乙车独运(1/3)小时完成，两车合运，多少小时可以运完？
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1 / (1/2)</gadget>
<output>2</output>

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

<gadget id="calculator">1 / (1/3)</gadget>
<output>3</output>

<gadget id="calculator">2 + 3</gadget>
<output>5</output>

<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<result>1/5 = around 0.2</result>