What is the area of a triangle whose base is 3 decimeters and whose height is 4 decimeters?
一个三角形底是3分米，高是4分米，它的面积是多少．
<gadget id="calculator">4 / 2</gadget>
<output>2</output>

<gadget id="calculator">3 * 2</gadget>
<output>6</output>

<result>6</result>