A log is 6 meters long. If a section with a length of 6 decimeters is cut off, the surface area is reduced by 18.84 square decimeters. What is the volume of this log in cubic decimeters?
一根圆木长6米，如果截去长6分米的一段后，表面积减少18.84平方分米，原来这根圆木的体积是多少立方分米？
<gadget id="calculator">2 ** 2</gadget>
<output>4</output>

<gadget id="calculator">18.84 / 6 / 3.14 / 4</gadget>
<output>0.25</output>

<gadget id="calculator">3.14 * 0.25 * 6 * 10</gadget>
<output>47.1</output>

<result>47.1</result>