Cut off a cylinder with a base diameter of 2 decimeters and a cylinder with a height of 3 decimeters. How many square decimeters is the surface area of the current cylinder reduced compared to the original one?
把一个底面直径2分米的圆柱体截去一个高3分米的圆柱体，现在的圆柱体，表面积比原来减少多少平方分米？
<gadget id="calculator">3.14 * 2 * 3</gadget>
<output>18.84</output>

<result>18.84</result>