If a cylinder with a height of 4 decimeters is cut and assembled into an approximate cuboid, the surface area is increased by 24 square decimeters, what is the original volume in cubic decimeters?
把一个高4分米的圆柱切拼成近似的长方体，表面积比原来增加了24平方分米，原来的体积是多少立方分米．
<gadget id="calculator">24 / 2 / 4</gadget>
<output>3</output>

<gadget id="calculator">3 ** 2</gadget>
<output>9</output>

<gadget id="calculator">3.14 * 9 * 4</gadget>
<output>113.04</output>

<result>113.04</result>