A cylinder and a cone have the same volume, the area of the base of the cylinder is half that of the cone, and the height of the cone is 9 cm, what is the height of the cylinder in cm
一个圆柱和圆锥的体积相等，圆柱的底面积是圆锥的一半，圆锥的高是9厘米，圆柱的高是多少厘米
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">9 * (2/3)</gadget>
<output>6</output>

<result>6</result>