40 times of 2.5 is equal to 10 times of x, x=what
2.5的40倍等于x的10倍，x=多少
<gadget id="calculator">40 / 10</gadget>
<output>4</output>

<gadget id="calculator">2.5 * 4</gadget>
<output>10</output>

<result>10</result>