A conical container with a height of 30 cm is filled with water, and all of it is poured into a cylindrical container with the same height as its bottom. What is the height of the water surface in centimeters?
在一个高为30cm的圆锥形容器里盛满水，将它全部倒入与它等底等高的圆柱形容器中，水面高多少厘米．
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">30 * (1/3)</gadget>
<output>10</output>

<result>10</result>