The number A is half of the number B, the number C is twice the number B, and the number C is how many times the number A.
甲数是乙数的一半，丙数是乙数的2倍，丙数是甲数的多少倍．
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">2 / (1/2)</gadget>
<output>4</output>

<result>4</result>