The area of a triangle is 20m**2, if the base is 5m, what is the height in m?
三角形的面积是20m**2，如果底是5m，高是多少m．
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">20 * (2/5)</gadget>
<output>8</output>

<result>8</result>