A parallelogram has a base of 8 cm and a height of 2 cm. If the base remains the same and the height increases by 2 cm, how much does the area increase?
一个平行四边形，底是8厘米，高是2厘米，如果底不变，高增加2厘米，则面积增加多少．
<gadget id="calculator">8 * 2</gadget>
<output>16</output>

<result>16</result>