The volume of a cone is 9.9 cubic decimeters, what is the volume of a cylinder with the same base and height as it?
一个圆锥的体积是9.9立方分米，和它等底同高的圆柱的体积应是多少．
<gadget id="calculator">9.9 * 3</gadget>
<output>29.7</output>

<result>29.7</result>