There is a cylinder with a base radius of 5 cm. If the height is increased by 2 cm, what is the increase in the lateral area in square centimeters?
有一个圆柱体，底面半径为5厘米，若高增加2厘米，侧面积增加多少平方厘米．
<gadget id="calculator">3.14 * 5 * 2 * 2</gadget>
<output>62.8</output>

<result>62.8</result>