If a cylinder is cut off by 12cm**3, it will just cut into the largest cone. What is the volume of this cylinder?
一个圆柱体削去12cm**3正好削成一个最大的圆锥体，这个圆柱体的体积是多少．
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 - (1/3)</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">12 / (2/3)</gadget>
<output>18</output>

<result>18</result>