A square is surrounded by a piece of iron wire 1 meter long. What is the side length of the square? (expressed in fractions)
用1米长的一段铁丝围成一个正方形，正方形的边长是多少米？(用分数表示)
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<result>1/4 = around 0.25</result>