What is the area of a triangle with a base of 6 decimeters and a height of 5 decimeters?
一个三角形，底6分米，高5分米，它的面积是多少．
<gadget id="calculator">5 / 2</gadget>
<output>5/2 = around 2.5</output>

<gadget id="calculator">6 * (5/2)</gadget>
<output>15</output>

<result>15</result>