A piece of iron wire forms a rectangle with a length of 16 cm and a width of 10 cm. If it encloses a square with it, what is the side length in cm?
一根铁丝围成一个长16厘米，宽10厘米的长方形，如果用它重围一个正方形，边长是多少厘米？
<gadget id="calculator">16 + 10</gadget>
<output>26</output>

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

<gadget id="calculator">26 * (1/2)</gadget>
<output>13</output>

<result>13</result>