How many conical aluminum ingots with the same height as the bottom can be cast from 4 cylindrical aluminum ingots.
4个圆柱形铝锭，可以熔铸成多少个与他等底等高的圆锥形铝锭．
<gadget id="calculator">4 * 3</gadget>
<output>12</output>

<result>12</result>