If a square paper with a side length of 31.4dm is enclosed into a cylinder, what is the volume of this cylinder in cubic decimeters?
将一张边长31.4dm的正方形纸围成一个圆柱，这个圆柱的体积是多少立方分米？
<gadget id="calculator">31.4 / 3.14 / 2</gadget>
<output>5</output>

<gadget id="calculator">5 ** 2</gadget>
<output>25</output>

<gadget id="calculator">3.14 * 25 * 31.4</gadget>
<output>2_464.9</output>

<result>2_464.9</result>