A piece of cardboard is a parallelogram, the length of the base is 22.5 cm, and it is 2.5 cm more than the height. What is the area of the cardboard?
一块平行四边形的纸板，底边长22.5厘米，比高多2.5厘米，这块纸板的面积是多少？
<gadget id="calculator">22.5 - 2.5</gadget>
<output>20</output>

<gadget id="calculator">22.5 * 20</gadget>
<output>450</output>

<result>450</result>