A cylinder and a cone with the same base and height, the volume difference is 40 cubic centimeters, what is the volume of the cylinder in cm**3.
等底等高的圆柱和圆锥，体积之差40立方厘米，圆柱的体积为多少cm**3．
<gadget id="calculator">3 - 1</gadget>
<output>2</output>

<gadget id="calculator">40 / 2</gadget>
<output>20</output>

<gadget id="calculator">20 * 3</gadget>
<output>60</output>

<result>60</result>