If a conical container with a height of 45 cm is filled with water and poured into a cylindrical container with the same bottom, what is the height of the water surface in cm?
一个高是45厘米的圆锥体容器，盛满水后再倒入和它等底的圆柱形容器里，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">45 * (1/3)</gadget>
<output>15</output>

<result>15</result>