A wire 45 cm long surrounds it into an equilateral triangle. What is the side length of this equilateral triangle?
一根铁丝长45厘米把它围成一个等边三角形，这个等边三角形的边长是多少厘米？
<gadget id="calculator">45 / 3</gadget>
<output>15</output>

<result>15</result>