The surface area of a cylinder is 6.28dm**2 larger than the lateral area, and its height is 10dm. What is the volume of this cylinder dm**3.
一个圆柱体的表面积比侧面积大6.28dm**2，高是10dm．这个圆柱体的体积是多少dm**3．
<gadget id="calculator">6.28 / 2</gadget>
<output>3.14</output>

<gadget id="calculator">3.14 * 10</gadget>
<output>31.4</output>

<result>31.4</result>