A cone has the same base area as a cylinder. It is known that the volume of the cylinder is 9 times that of the cone. The height of the cylinder is 23.4 cm. How many centimeters is the height of the cone?
一个圆锥与一个圆柱的底面积相等，已知圆柱的体积是圆锥的9倍，圆柱的高是23.4cm，圆锥的高是多少厘米？
<gadget id="calculator">23.4 / 3</gadget>
<output>7.8</output>

<result>7.8</result>