The height of a conical container is 9 cm. The container is filled with water. If all the water is poured into a cylindrical container with the same height as its bottom, how many centimeters will the water surface be from the container mouth?
圆锥形容器高9厘米，容器中盛满水，如将水全部倒入与它等底等高的圆柱形容器，水面离容器口多少厘米．
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">9 * (1/3)</gadget>
<output>3</output>

<gadget id="calculator">9 - 3</gadget>
<output>6</output>

<result>6</result>