The volume difference between a cylinder and a cone with the same base and height is 15cm**3, what is the volume of this cylinder in cm**3.
一个圆柱与和它等底等到高的圆锥体积相差15cm**3，这个圆柱的体积是多少cm**3．
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">15 / (2/3)</gadget>
<output>45/2 = around 22.5</output>

<result>45/2 = around 22.5</result>