The surface area of a cylinder is 8 decimeters larger than the lateral area, and its height is 10 decimeters. What is the volume of this circle in cubic decimeters?
一个圆柱的表面积比侧面积大8平方分米，高10分米，这个圆住的体积是多少立方分米．
<gadget id="calculator">8 / 2</gadget>
<output>4</output>

<gadget id="calculator">4 * 10</gadget>
<output>40</output>

<result>40</result>