What is the area of a parallelogram with a base of 24 cm and a height of 2 decimeters?
一个平行四边形，底是24厘米，高2分米，面积是多少．
<gadget id="calculator">2 * 10</gadget>
<output>20</output>

<gadget id="calculator">24 * 20</gadget>
<output>480</output>

<result>480</result>