On a cylindrical steel column with a length of 4 meters, an iron wire with a length of 31.4 decimeters is wound around the column exactly 10 times. What is the volume of this steel column in cubic decimeters?
在长4米的圆柱形钢柱上，用一根长31.4分米的铁丝正好沿钢柱绕10圈，这根钢柱的体积是多少立方分米．
<gadget id="calculator">31.4 / 10</gadget>
<output>3.14</output>

<gadget id="calculator">3.14 / 3.14 / 2</gadget>
<output>0.5</output>

<gadget id="calculator">0.5 ** 2</gadget>
<output>0.25</output>

<gadget id="calculator">3.14 * 0.25 * 4 * 10</gadget>
<output>31.4</output>

<result>31.4</result>