If the diameter of the base of a cylinder is 10 cm, if the height increases by 2 cm, then how many square centimeters does its lateral area increase? (π takes 3.14)
一个圆柱底面直径是10厘米，如果高增加2厘米，那么它的侧面积增加多少平方厘米．(π取3.14)
<gadget id="calculator">3.14 * 10 * 2</gadget>
<output>62.8</output>

<result>62.8</result>