A cylinder with a height of 2 decimeters has a lateral area of 251.2 square centimeters. What is the volume of this cylinder in cubic centimeters?
一个高为2分米的圆柱体，侧面积是251.2平方厘米．原来这个圆柱体的体积是多少立方厘米？
<gadget id="calculator">2 * 10</gadget>
<output>20</output>

<gadget id="calculator">251.2 / 20 / 3.14 / 2</gadget>
<output>2</output>

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

<gadget id="calculator">3.14 * 4 * 20</gadget>
<output>251.2</output>

<result>251.2</result>