The two adjacent sides of a parallelogram are 6 decimeters and 4 decimeters respectively, and the height of one side is measured as 5 decimeters. What is the area of the parallelogram in square decimeters?
一个平行四边形相邻两条边分别是6分米、4分米，量得一条边上的高为5分米，这个平行四边形的面积是多少平方分米．
<gadget id="calculator">4 * 5</gadget>
<output>20</output>

<result>20</result>