If the base of a parallelogram is 5 decimeters and the height is 3.6 decimeters, what is its area?
一个平行四边形底是5分米，高是3.6分米，它的面积是多少平方分米．
<gadget id="calculator">5 * 3.6</gadget>
<output>18</output>

<result>18</result>