square iron sheet with a side length of 18.84 cm, coupled with a cylindrical iron sheet with a radius of how many centimeters, can just make a cylindrical container.
一个边长是18.84厘米的正方形铁皮，配上半径是多少厘米的圆柱形铁皮，就能正好做成一个圆柱形的容器．
<gadget id="calculator">18.84 / 3.14 / 2</gadget>
<output>3</output>

<result>3</result>