A square with a side length of 6 cm is surrounded by a piece of iron wire. If this wire is used to form an equilateral triangle, what is the side length of the equilateral triangle in cm?
用一根铁丝围成一个边长是6厘米的正方形，如果把这根铁丝围成一个等边三角形，等边三角形的边长是多少厘米？
<gadget id="calculator">6 / 3</gadget>
<output>2</output>

<gadget id="calculator">4 * 2</gadget>
<output>8</output>

<result>8</result>