After cutting off 4.5 cubic decimeters from a cylindrical piece of wood, what is the volume of a cone with the same base and the same height as it?
把一根圆柱木段削去4.5立方分米后，得到与它等底登高的圆锥体的体积是多少．
<gadget id="calculator">3 - 1</gadget>
<output>2</output>

<gadget id="calculator">4.5 / 2</gadget>
<output>2.25</output>

<result>2.25</result>