A cylinder and a cone with the same base area and volume, if the height of the cone is 15cm, what is the height of the cylinder in cm?
底面积、体积分别相等的圆柱和圆锥，如果圆锥的高是15cm，圆柱的高是多少cm．
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">15 * (1/3)</gadget>
<output>5</output>

<result>5</result>