cylinder has a radius of 2 cm and a height of 1 decimeter. If the cylinder is divided into three equal cylinders along the cross section, how many square centimeters will the total surface area increase now?
一个圆柱，半径是2厘米，高是1分米，沿着横截面把这个圆柱平均分成三个圆柱，现在表面积共增加了多少平方厘米．
<gadget id="calculator">2 ** 2</gadget>
<output>4</output>

<gadget id="calculator">3.14 * 4 * 4</gadget>
<output>50.24</output>

<result>50.24</result>