The volume of a cone is 45 cubic centimeters, how many cubic centimeters less than the volume of a cylinder with the same base and height.
一个圆锥的体积是45立方厘米，比与它等底等高的圆柱的体积少多少立方厘米．
<gadget id="calculator">3 - 1</gadget>
<output>2</output>

<gadget id="calculator">45 * 2</gadget>
<output>90</output>

<result>90</result>