(1/4) of a number is 12, what is (3/8) of it.
一个数的(1/4)是12，它的(3/8)是多少．
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">12 / (1/4)</gadget>
<output>48</output>

<gadget id="calculator">3 / 8</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">48 * (3/8)</gadget>
<output>18</output>

<result>18</result>