The circumference of a cylindrical wood is 12.56 decimeters and the height is 4 decimeters. What is the volume of this cylindrical wood in cubic decimeters?
一根圆柱形木料底面周长是12.56分米，高4分米，那么这根圆柱形木料的体积是多少立方分米．
<gadget id="calculator">12.56 / 2 / 3.14</gadget>
<output>2</output>

<gadget id="calculator">2 ** 2</gadget>
<output>4</output>

<gadget id="calculator">3.14 * 4 * 4</gadget>
<output>50.24</output>

<result>50.24</result>