If a cylinder is cut off by 9 cubic centimeters, it will be exactly cut into a cone with its base and height. What is the volume of this cylinder?
一个圆柱体，削去9立方厘米，正好削成一个与它等底等高的圆锥体，这个圆柱体的体积是多少．
<gadget id="calculator">9 / 2</gadget>
<output>9/2 = around 4.5</output>

<gadget id="calculator">9 + (9/2)</gadget>
<output>27/2 = around 13.5</output>

<result>27/2 = around 13.5</result>