A cylinder and a cone have the same base and height. It is known that the volume difference between the cylinder and the cone is 3 cubic decimeters. What is the volume of the cone?
一个圆柱和一个圆锥等底等高，已知圆柱与圆锥体积相差3立方分米，圆锥的体积是多少立方分米．
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">3 * (1/2)</gadget>
<output>3/2 = around 1.5</output>

<result>3/2 = around 1.5</result>