A cylinder has a base radius of 5 cm and a height of 12 cm. If its height is reduced by 2 cm, the surface area will be reduced by how many square centimeters.
一个圆柱的底面半径是5厘米，高12厘米，如果把它的高减少2厘米，则表面积减少多少平方厘米．
<gadget id="calculator">2 * 3.14 * 5 * 2</gadget>
<output>62.8</output>

<result>62.8</result>