After cutting a cylinder with a height of 3 decimeters into an approximate cuboid with the same base as the cylinder, the surface area increases by 24 decimeters. What is the volume of the original cylinder in cubic decimeters?
把一个高3分米的圆柱体割拼成一个与这个圆柱体等底的近似长方体后，表面积增加了24平方分米，原来圆柱体的体积是多少立方分米．
<gadget id="calculator">24 / 2 / 3</gadget>
<output>4</output>

<gadget id="calculator">3.14 * 4 * 4 * 3</gadget>
<output>150.72</output>

<result>150.72</result>