The difference between the volumes of a cylinder and a cone with the same base and height is 5.6 cubic decimeters. What is the volume of the cylinder in cubic decimeters?
等底等高的圆柱和圆锥体积之差是5.6立方分米，圆柱的体积是多少立方分米．
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">5.6 / (2/3)</gadget>
<output>8.4</output>

<result>8.4</result>