How many cones can be cast by melting 9 cylinders of the same size into cones with the same base and height?
把9个同样大小的圆柱熔化成与它等底等高的圆锥，能熔铸成多少个．
<gadget id="calculator">9 * 3</gadget>
<output>27</output>

<result>27</result>