Two identical triangles are combined to form a parallelogram. If the area of each triangle is 8cm**2, what is the area of the parallelogram formed?
两个完全一样的三角形拼成一个平行四边形，如果每个三角形面积是8cm**2，那么，拼成的平行四边形面积是多少．
<gadget id="calculator">8 * 2</gadget>
<output>16</output>

<result>16</result>