A cylinder and a cone have the same base and height. It is known that the volume of the cone is 6.28 cubic decimeters less than that of the cylinder. What is the volume of the cone?
一个圆柱和一个圆锥等底等高，已知圆锥体积比圆柱少6.28立方分米，圆锥的体积是多少立方分米．
<gadget id="calculator">3 - 1</gadget>
<output>2</output>

<gadget id="calculator">6.28 / 2</gadget>
<output>3.14</output>

<result>3.14</result>