A conical container with a height of 18 cm is filled with water and poured into a cylindrical container with the same bottom and height, what is the height of the water surface in cm?
一个高为18厘米的圆锥体容器盛满水，倒入与它等底等高的圆柱体容器中，水面高是多少厘米．
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">18 * (1/3)</gadget>
<output>6</output>

<result>6</result>