The volume of a cup is (1/4)L, how many cups of this cup can be filled in a 3L jug.
一个水杯的容积是(1/4)L，一个3L的水壶可以倒多少杯这样的水杯．
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">3 / (1/4)</gadget>
<output>12</output>

<result>12</result>