The area of a trapezoid is 24.6cm**2, and the base of a parallelogram equal to it is equal to the sum of the two bases of the trapezoid. What is the area of this parallelogram?
一个梯形的面积是24.6cm**2，和它等高的平行四边形的底等于梯形两底之和，这个平行四边形的面积是多少．
<gadget id="calculator">24.6 * 2</gadget>
<output>49.2</output>

<result>49.2</result>