The upper base of a trapezoid is 8 meters, the lower base is 12 meters, and the distance between the upper base and the lower base is 6 meters. What is the area of this trapezoid in square meters?
一个梯形的上底是8米，下底是12米，上底与下底的距离是6米．这个梯形的面积是多少平方米．
<gadget id="calculator">8 + 12</gadget>
<output>20</output>

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

<gadget id="calculator">20 * 3</gadget>
<output>60</output>

<result>60</result>