Divide a cylinder into 3 sections on average and become 3 completely equal cylinders. At this time, the surface area increases by 25.12 square centimeters compared to the original one. What is the area of the base of the cylinder in square centimeters?
把一个圆柱平均分成3段，变成了3个完全相等的圆柱，这时表面积比原来增加了25.12平方厘米，这个圆柱的底面积是多少平方厘米．
<gadget id="calculator">25.12 / 4</gadget>
<output>6.28</output>

<result>6.28</result>