After unfolding the sides of a cylinder, a parallelogram is obtained, its base is 62.8 cm, and its area is 628 square centimeters. What is the volume of this cylinder?
把一个圆柱的侧面展开后，得到一个平行四边形，它的底是62.8cm，面积是628平方厘米．这个圆柱的体积是多少？
<gadget id="calculator">62.8 / 3.14 / 2</gadget>
<output>10</output>

<gadget id="calculator">10 ** 2</gadget>
<output>100</output>

<gadget id="calculator">3.14 * 100 * 10</gadget>
<output>3_140</output>

<result>3_140</result>