Use a rope to form a rectangle with a length of 10 cm and a width of 6 cm. Now use this rope to surround a square. What is the side length of this square in cm?
用一条绳子围成一个长10厘米宽6厘米的长方形，现在用这条绳子围一个正方形，这个正方形的边长是多少厘米？
<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>