A cylinder and a cone with the same base and height, if the sum of the volumes of the cylinder is 28 cubic centimeters, what is the volume of the cone in cubic centimeters?
等底等高的圆柱和圆锥，如果圆柱的体积和是28立方厘米，那么圆锥的体积是多少立方厘米．
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">28 * (1/3)</gadget>
<output>28/3 = around 9.333333</output>

<result>28/3 = around 9.333333</result>