A wire can form a square with a side length of 3 decimeters. If this wire is used to form an equilateral triangle, how many decimeters is the length of one side of the triangle?
一根铁丝可以围成一个边长为3分米的正方形，如果用这根铁丝围成一个等边三角形，这个三角形的一条边长多少分米？
<gadget id="calculator">3 * 4</gadget>
<output>12</output>

<gadget id="calculator">12 / 3</gadget>
<output>4</output>

<result>4</result>