The area of a triangle is 15cm**2, its base is 5cm, what is its height?
一个三角形的面积是15cm**2，它的底是5厘米，高是多少．
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">15 * (2/5)</gadget>
<output>6</output>

<result>6</result>