Divide 54 books into three groups. (1/2) of group A is (1/3) of group B, which is equal to (1/4) of group C. How much does group A get?
把54本书分给三个组，甲组的(1/2)是乙组的(1/3)，和丙组的(1/4)相等，甲组分得多少．
<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>