The circumference of a square is equal to the circumference of a circle, and the circumference of a known circle is 12.56dm, then the side length of the square is.
一个正方形的周长和一个圆的周长相等，已知圆的周长是12.56dm，那么正方形的边长是．
<gadget id="calculator">12.56 / 4</gadget>
<output>3.14</output>

<result>3.14</result>