The area of a triangle is 12.5m**2, the base is 2.5m, what is the height.
一个三角形的面积是12.5m**2，底是2.5m，高是多少．
<gadget id="calculator">2 / 2.5</gadget>
<output>0.8</output>

<gadget id="calculator">12.5 * 0.8</gadget>
<output>10</output>

<result>10</result>