The radius of the base of a cylinder is 2 decimeters, and the lateral area of the cylinder is 62.8 square decimeters. What is the volume of this cylinder?
一个圆柱体底面半径是2分米，圆柱侧面积是62.8平方分米，这个圆柱体的体积是多少立方分米？
<gadget id="calculator">2 ** 2</gadget>
<output>4</output>

<gadget id="calculator">62.8 / 2 / 3.14 / 2</gadget>
<output>5</output>

<gadget id="calculator">3.14 * 4 * 5</gadget>
<output>62.8</output>

<result>62.8</result>