The volume difference between the cylinder and the cone with the same base and height is 2.4 cubic meters, what is the volume of the cone in cubic meters?
等底等高的圆柱与圆锥体积相差2.4立方米，圆锥的体积是多少立方米．
<gadget id="calculator">3 - 1</gadget>
<output>2</output>

<gadget id="calculator">2.4 / 2</gadget>
<output>1.2</output>

<result>1.2</result>