A wire can enclose a square with a side length of 3 centimeters. If it is changed to enclose an equilateral triangle, what is the side length of the equilateral triangle in centimeters?
一根铁丝可以围成一个边长为3厘米的正方形，如果改围一个等边三角形，那么等边三角形的边长是多少厘米．
<gadget id="calculator">3 / 3</gadget>
<output>1</output>

<gadget id="calculator">4 * 1</gadget>
<output>4</output>

<result>4</result>