How many conical parts with the same base and height as the cylinder can be cast from 4 identical cylindrical billets.
4个同样的圆柱体钢胚可以熔铸成多少个与圆柱等底等高的圆锥体零件．
<gadget id="calculator">3 * 4</gadget>
<output>12</output>

<result>12</result>