Cut a cylinder with a height of 3 decimeters into equal parts along the diameter of the ground and assemble it into an approximate cuboid. The surface area of the cuboid is increased by 24 square decimeters compared with the original one. Find the volume of this cylinder in cubic decimeters.
把一个高3分米的圆柱沿着地面直径等份切开，拼成一个近似的长方体，长方体表面积比原来增加24平方分米．求这个圆柱的体积是多少立方分米．
<gadget id="calculator">24 / 2 / 3 / 2</gadget>
<output>2</output>

<gadget id="calculator">2 ** 2</gadget>
<output>4</output>

<gadget id="calculator">3.14 * 4 * 3</gadget>
<output>37.68</output>

<result>37.68</result>