5 identical squares are surrounded by a 9-meter-long iron wire, how many meters of iron wire are used for each square?
用9米长的铁丝围成5个相同的正方形，每个正方形要用多少米铁丝？
<gadget id="calculator">9 / 5</gadget>
<output>9/5 = around 1.8</output>

<result>9/5 = around 1.8</result>