Print a document, A (1/3) hours can be completed, B (1/2) hours can be completed, if two people cooperate how many hours can be completed.
打印一篇文稿，甲(1/3)小时可以完成，乙(1/2)小时可以完成，如果两人合作多少小时可以完成．
<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">1 / 2</gadget>
<output>1/2 = around 0.5</output>

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

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

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

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