The volume of a cone is 6.28 cubic decimeters, how many cubic decimeters less than the volume of a cylinder with the same base height.
一个圆锥的体积是6.28立方分米，比与它等底高的圆柱的体积少多少立方分米．
<gadget id="calculator">6.28 * 3</gadget>
<output>18.84</output>

<gadget id="calculator">18.84 - 6.28</gadget>
<output>12.56</output>

<result>12.56</result>