A cylindrical container can be made by using a square iron sheet with a side length of 18.84 decimeters and a circular bottom with a radius of decimeters.
用一块边长是18.84分米的正方形铁皮，配上半径是多少分米的圆形底面就能做成一个圆柱体容器．
<gadget id="calculator">18.84 / 3.14 / 2</gadget>
<output>3</output>

<result>3</result>