A cylinder and a cone with the same base and height have a volume difference of 18 square decimeters. What is the volume of the cylinder in cubic decimeters?
等底等高的圆柱和圆锥，它们体积相差18平方分米，圆柱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">18 / (2/3)</gadget>
<output>27</output>

<result>27</result>