The cross-section of a dam is a trapezoid, the upper base is 3.6 meters, the lower base is 8 meters, and the height is 6 meters. What is the cross-sectional area of this dam in square meters?
一座堤坝的横截面是一个梯形，上底是3.6米，下底是8米，高是6米，这座堤坝的横截面的面积是多少平方米？
<gadget id="calculator">3.6 + 8</gadget>
<output>11.6</output>

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

<gadget id="calculator">11.6 * 3</gadget>
<output>34.8</output>

<result>34.8</result>