A piece of iron wire can exactly form a rectangle with a length of 10 cm and a width of 6 cm. If this wire is used to form the largest square, what is the side length of this square?
一根铁丝正好能围成一个长10厘米，宽6厘米的长方形，如果用这根铁丝围成一个最大的正方形，这个正方形的边长是多少？
<gadget id="calculator">10 + 6</gadget>
<output>16</output>

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

<gadget id="calculator">16 * (1/2)</gadget>
<output>8</output>

<result>8</result>