Expand the side area of a cylinder to get a rectangle with a length of 6.28 decimeters and a width of 10 decimeters. What is the volume of this cylinder in cubic decimeters?
把一个圆柱体的侧面积展开得到一个长6.28分米、宽10分米的长方形，这个圆柱体的体积是多少立方分米．
<gadget id="calculator">6.28 / 3.14 / 2</gadget>
<output>1</output>

<gadget id="calculator">1 ** 2</gadget>
<output>1</output>

<gadget id="calculator">3.14 * 1 * 10</gadget>
<output>31.4</output>

<result>31.4</result>