The lengths of the two adjacent sides of a parallelogram frame are 9 decimeters and 5 decimeters respectively. If it is drawn into a rectangle, what is the area of the rectangle in square decimeters?
一个平行四边形框架相邻两边的长分别为9分米和5分米，如果把它拉成一个长方形，这个长方形的面积是多少平方分米．
<gadget id="calculator">9 * 5</gadget>
<output>45</output>

<result>45</result>