Put two identical trapezoids together to form a parallelogram with an area of 100 square meters, what is the area of each trapezoid in square meters?
把两个完全相同的梯形拼成一个面积是100平方米的平行四边形，每个梯形的面积是多少平方米．
<gadget id="calculator">100 / 2</gadget>
<output>50</output>

<result>50</result>