If a 6-meter-long cylindrical wood is cut into 3 sections, the surface area increases by 28.24 square decimeters. What is the volume of this cylinder?
把一根长6米圆柱形木料截成3段，表面积增加28.24平方分米，这个圆柱的体积是多少．
<gadget id="calculator">28.24 / 4</gadget>
<output>7.06</output>

<gadget id="calculator">6 * 10</gadget>
<output>60</output>

<gadget id="calculator">7.06 * 60</gadget>
<output>423.6</output>

<result>423.6</result>