The ratio of the perimeter of a cylinder to the bottom of a cone is 2:3, the ratio of volume is 4:5, the height of the cone is 6 cm, how many cm is the height of the cylinder?
一个圆柱和圆锥底面周长比是2：3，体积比是4：5，圆锥高有6厘米，圆柱高有多少厘米．
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">6 * (3/5)</gadget>
<output>18/5 = around 3.6</output>

<result>18/5 = around 3.6</result>