The area of a triangle is 40cm**2, the height is 5cm, what is its base in cm?
一个三角形的面积是40cm**2，高是5cm，它的底是多少cm．
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">40 * (2/5)</gadget>
<output>16</output>

<result>16</result>