A number is 42, what is its (3/7)?
一个数是42，它的(3/7)是多少．
<gadget id="calculator">3 / 7</gadget>
<output>3/7 = around 0.428571</output>

<gadget id="calculator">42 * (3/7)</gadget>
<output>18</output>

<result>18</result>