The volume of a cylinder is 27 cubic decimeters, how many cubic decimeters should be cut to form the largest cone.
一个圆柱的体积是27立方分米，把它削成一个最大的圆锥，要削去多少立方分米．
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">27 * (2/3)</gadget>
<output>18</output>

<result>18</result>