Cut a cylinder into the largest cone, and the volume obtained is 15cm**3, then what is the volume of the cylinder in cm**3?
把一个圆柱削成一个最大的圆锥体，得到的体积是15cm**3，那么圆柱的体积是多少cm**3．
<gadget id="calculator">15 * 3</gadget>
<output>45</output>

<result>45</result>