A triangle and a parallelogram with the same base and height, and the area of the triangle is 25 square meters, what is the area of the parallelogram?
等底等高的三角形和平行四边形，三角形的面积为25平方米，则平行四边形的面积是多少．
<gadget id="calculator">25 * 2</gadget>
<output>50</output>

<result>50</result>