If a cylinder is divided into four equal cylinders and the surface area is increased by 18.84 square decimeters, what is the area of a base of the cylinder in square decimeters?
把一个圆柱分成相等的四个圆柱，表面积增加18.84平方分米，则圆柱的一个底面的面积是多少平方分米．
<gadget id="calculator">18.84 / 6</gadget>
<output>3.14</output>

<result>3.14</result>