If the area of a triangle is 8 square decimeters, what is the area of a parallelogram with the same base and height?
一个三角形的面积是8平方分米，和它等底等高的平行四边形面积是多少平方分米．
<gadget id="calculator">8 * 2</gadget>
<output>16</output>

<result>16</result>