The base of a triangle is 2.5 cm, the area is 10 cm2, what is the height?
一个三角形的底是2.5厘米，面积是10平方厘米，高是多少．
<gadget id="calculator">2 / 2.5</gadget>
<output>0.8</output>

<gadget id="calculator">10 * 0.8</gadget>
<output>8</output>

<result>8</result>