What is the area of a triangle with a base of 0.4 meters and a height of 0.6 meters?
三角形底0.4米，高0.6米，它的面积是多少．
<gadget id="calculator">0.6 / 2</gadget>
<output>0.3</output>

<gadget id="calculator">0.4 * 0.3</gadget>
<output>0.12</output>

<result>0.12</result>