If a conical container with a height of 30 cm is filled with water and poured into a cylindrical container with the same height as the bottom, what is the height of the water surface in cm?
用一个高是30厘米的圆锥形容器盛满水，倒入和它等底等高的圆柱形容器中，水面的高度是多少厘米．
<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>