An inverted conical container is filled with 2 liters of water, and the height of the water surface is (1/3) of the height of the container, how much water can the container hold.
一个倒立的圆锥容器，里面装有2升水，水面高度是容器高度的(1/3)，则容器还可以装多少水．
<gadget id="calculator">2 * 27</gadget>
<output>54</output>

<gadget id="calculator">54 - 2</gadget>
<output>52</output>

<result>52</result>