Nail a rectangle with a length of 5 decimeters and a width of 2 decimeters with wooden strips. Now pull the opposite corners of the rectangle to make it a parallelogram with a height of 3 decimeters. What is the area of this parallelogram in square decimeters?
用木条钉一个长5分米，宽2分米的长方形，现拉住长方形的对角，使它成为一个高为3分米的平行四边形，则这个平行四边形的面积为多少平方分米．
<gadget id="calculator">2 * 3</gadget>
<output>6</output>

<result>6</result>