Cut a cylinder with a volume of 18cm**3 into the largest cone, what is the volume of the cut part in cm**3.
把一个体积是18cm**3的圆柱削成一个最大的圆锥，削去部分的体积是多少cm**3．
<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">18 * (2/3)</gadget>
<output>12</output>

<result>12</result>