After cutting a cylindrical steel with a length of 15 decimeters into three equal sections, the surface area increases by 9.6 square decimeters compared with the original one. What is the volume of this cylindrical steel in cubic decimeters?
把一根长15分米的圆柱形钢材截成相等的三段后，表面积比原来增加了9.6平方分米，这根圆柱形钢材的体积是多少立方分米．
<gadget id="calculator">9.6 / 4</gadget>
<output>2.4</output>

<gadget id="calculator">2.4 * 15</gadget>
<output>36</output>

<result>36</result>