(1/2) of a number is 5, what is this number?
一个数的(1/2)是5，这个数是多少．
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">5 / (1/2)</gadget>
<output>10</output>

<result>10</result>