A cylinder with a length of 80 decimeters is cut three times and becomes a small cylinder with the same length. The surface area increases by 113.04 decimeters. Find the volume of the original cylinder in cubic decimeters.
一个长80分米的圆柱体截了三次后变成长短相等的小圆柱体，表面积比原来增加了113.04平方分米，求原圆柱体的体积是多少立方分米．
<gadget id="calculator">2 * 3</gadget>
<output>6</output>

<gadget id="calculator">113.04 / 6</gadget>
<output>18.84</output>

<gadget id="calculator">18.84 * 80</gadget>
<output>1_507.2</output>

<result>1_507.2</result>