cylinder and a cone have the same volume and the same base area. It is known that the height of the cylinder is 10 cm, what is the height of the cone.
一个圆柱与一个圆锥体积相等，底面积也相等．已知圆柱的高是10厘米，圆锥的高是多少．
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">10 / (1/3)</gadget>
<output>30</output>

<result>30</result>