The lower base of a trapezoid is 24 meters and the height is 10 meters. If the upper base is increased by 8 meters, it becomes a parallelogram. What is the area of the original trapezoid in square meters?
一个梯形的下底是24米，高10米，如果上底增加8米就成为平行四边形，原来梯形的面积是多少平方米．
<gadget id="calculator">24 - 8</gadget>
<output>16</output>

<gadget id="calculator">16 + 24</gadget>
<output>40</output>

<gadget id="calculator">10 / 2</gadget>
<output>5</output>

<gadget id="calculator">40 * 5</gadget>
<output>200</output>

<result>200</result>