A piece of wire surrounds a rectangle with a length of 6 cm and a width of 4 cm. If it is used to form a square, what is the side length of the square?
一根铁丝正好围成了一个长6厘米，宽4厘米的长方形，如果用它围成一个正方形，这个正方形的边长是多少厘米？
<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>