The area of the base of the cylinder and the cone is equal, if the volume of the cylinder is 2/3 of the cone, the height of the cylinder is equal to the volume of the cone.
圆柱与圆锥底面积相等，如圆柱体积是圆锥的(2/3)，圆柱的高是圆锥的多少．
<gadget id="calculator">2 / 9</gadget>
<output>2/9 = around 0.222222</output>

<result>2/9 = around 0.222222</result>