A cone is twice the volume of a cylinder and their bases have the same area. Given that the height of the cone is 18 cm, what is the height of the cylinder in cm?
一个圆锥是一个圆柱体积的2倍，它们底面积相等．已知圆锥的高是18厘米，圆柱的高是多少厘米．
<gadget id="calculator">6 / 1</gadget>
<output>6</output>

<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">18 * (1/6)</gadget>
<output>3</output>

<result>3</result>