A cylinder is 15 decimeters high and its base area is 3.14 decimeters square. If it is cut into two small cylinders of the same size, how many square decimeters will the surface area increase from the original?
一个圆柱高15分米，底面积是3.14平方分米，把它截成两个同样的小圆柱体后，表面积比原来增加了多少平方分米
<gadget id="calculator">3.14 * 2</gadget>
<output>6.28</output>

<result>6.28</result>