If x/0.5=12, then 4x=how much.
如果x/0.5=12，那么4x=多少．
<gadget id="calculator">1 / 0.5</gadget>
<output>2</output>

<gadget id="calculator">12 / 2</gadget>
<output>6</output>

<gadget id="calculator">4 * 6</gadget>
<output>24</output>

<result>24</result>