(1/3) of a pile of pen refills is 4, how many pen refills are there in this pile.
一堆笔芯的(1/3)是4支，这堆笔芯有多少支．
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

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

<result>12</result>