A cylinder has a volume 20 cubic decimeters greater than that of a cone with the same base and height. What is the volume of the cylinder?
一个圆柱体比一个与它等底等高的圆锥体的体积多20立方分米，这个圆柱体的体积是多少立方分米．
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 - (1/3)</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">20 / (2/3)</gadget>
<output>30</output>

<result>30</result>