Use an iron wire to form a rectangle with a length of 6 meters and a width of 4 meters. Now use this iron wire to form a square. What is the length of its side?
用一根铁丝围成一个长为6米，宽为4米的长方形，现用这根铁丝围成一个正方形，它的边长是多少米？
<gadget id="calculator">6 + 4</gadget>
<output>10</output>

<gadget id="calculator">2 / 4</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">10 * (1/2)</gadget>
<output>5</output>

<result>5</result>