cylinder and a cone have the same base area and volume. The height of the cone is 9 cm. What is the height of the cylinder in cm?
底面积和体积相等的圆柱和圆锥，圆锥的高是9厘米，圆柱的高是多少厘米．
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

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

<result>3</result>