A piece of iron wire can be folded into a rectangle with a length of 13.2 cm and a width of 9.6 cm. If the wire is straightened and then folded into an equilateral triangle, what is the side length of this triangle in centimeters?
用一根铁丝可以折成一个长13.2cm、宽9.6cm的长方形，如果把这根铁丝拉直，再折成一个等边三角形，这个三角形的边长是多少厘米？
<gadget id="calculator">13.2 + 9.6</gadget>
<output>22.8</output>

<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">22.8 * (2/3)</gadget>
<output>15.2</output>

<result>15.2</result>