The diameter of the base of a cylinder is 10 cm. If the height increases by 2 cm, how much does the surface area increase in square centimeters?
一个圆柱的底面直径是10厘米，若高增加2厘米，则表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>