There is a cylinder with a base diameter of 10 cm, if the height increases by 2 cm, what is the increase in the lateral area in square centimeters
有一个圆柱，底面直径是10厘米，若高增加2厘米，则侧面积增加多少平方厘米
<gadget id="calculator">3.14 * 10 * 2</gadget>
<output>62.8</output>

<result>62.8</result>