Two cones and cylinders with equal base radii have a volume ratio of 1:4. It is known that the height of the cylinder is 8 cm, and how many centimeters is the height of the cone.
两个底面半径相等的圆锥体和圆柱体，它们的体积比是1：4，已知圆柱高8厘米，圆锥高多少厘米．
<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">8 * (3/4)</gadget>
<output>6</output>

<result>6</result>