A cylinder and a cone have the same base and height, the volume of the cone is known to be 15 cm**3, what is the volume of the cylinder in cm**3.
一个圆柱和一个圆锥等底等高，已知圆锥的体积是15厘米**3，圆柱的体积是多少厘米**3．
<gadget id="calculator">15 * 3</gadget>
<output>45</output>

<result>45</result>