To cut a cylinder of 12 cubic centimeters into the largest cone, how many cubic centimeters need to be cut.
把一个12立方厘米的圆柱体，削成一个最大的圆锥体，需要削去多少立方厘米．
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">12 * (2/3)</gadget>
<output>8</output>

<result>8</result>