If an 8-meter-long cylindrical piece of wood is sawn into 4 sections, the surface area increases by 18 square decimeters. What is the original volume of this cylindrical piece of wood?
把一根8米长的圆柱形木材锯成4段，表面积增加了18平方分米，这根圆柱形木材原来的体积是多少立方分米．
<gadget id="calculator">18 / 6</gadget>
<output>3</output>

<gadget id="calculator">3 * 8 * 10</gadget>
<output>240</output>

<result>240</result>