The lateral expansion of a cylinder is a square, and the circumference of the base is 6.28 decimeters. What is the volume of the cylinder in cubic decimeters?
一个圆柱的侧面展开是一个正方形，底面周长是6.28分米，圆柱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 * 6.28</gadget>
<output>19.7192</output>

<result>19.7192</result>