A cylinder and a cone with equal base and equal volume, if the height of the cone is 12 cm, what is the height of the cylinder in cm?
等底等体积的圆柱和圆锥，如果圆锥的高是12厘米，那么圆柱的高是多少厘米．
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">12 * (1/3)</gadget>
<output>4</output>

<result>4</result>