It is known that the radius of the bottom surface of a cylinder is 4 decimeters, and the lateral area is 62.8 decimeters squared. What is the volume of this cylinder in cubic decimeters?
已知一个圆柱的底面半径是4分米，侧面积是62.8平方分米，这个圆柱的体积是多少立方分米．
<gadget id="calculator">4 ** 2</gadget>
<output>16</output>

<gadget id="calculator">2 * 3.14 * 4</gadget>
<output>25.12</output>

<gadget id="calculator">62.8 / 25.12</gadget>
<output>2.5</output>

<gadget id="calculator">3.14 * 16 * 2.5</gadget>
<output>125.6</output>

<result>125.6</result>