If a cylinder with a radius of 1 decimeter and a length of 1 meter is cut into 4 sections on average, how many square decimeters will the total surface area increase?
一个圆柱体半径为1分米，长为1米，平均截成4段，表面积一共增加了多少平方分米．
<gadget id="calculator">1 ** 2</gadget>
<output>1</output>

<gadget id="calculator">3.14 * 1 * 6</gadget>
<output>18.84</output>

<result>18.84</result>