The area of a triangle is 15 square centimeters, the base is 5 centimeters, what is the height?
三角形的面积是15平方厘米，底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>