A cylindrical piece of wood is 4m long. After cutting it into 4 equal cylinders, the surface area increases by 18.84 square centimeters. What is the volume of this piece of wood in cubic centimeters?
一根圆柱形木材长4m，把它截成相等的4段圆柱体后，表面积增加了18.84平方厘米．原来这根木材的体积是多少立方厘米？
<gadget id="calculator">18.84 / 6</gadget>
<output>3.14</output>

<gadget id="calculator">100 / 100</gadget>
<output>1</output>

<gadget id="calculator">3.14 * 4 * 1</gadget>
<output>12.56</output>

<result>12.56</result>