How many cylinders with the same base and height as the cone can be cast from 30 identical cones?
30个同样的圆锥可熔铸成多少个和圆锥等底等高的圆柱．
<gadget id="calculator">3 / 1</gadget>
<output>3</output>

<gadget id="calculator">30 / 3</gadget>
<output>10</output>

<result>10</result>