An equilateral triangle vegetable field is surrounded by a 18.6-meter-long fence. What is the side length of this equilateral triangle vegetable field?
用18.6米长的篱笆围成一个等边三角形的菜地，这个等边三角形菜地的边长是多少米？
<gadget id="calculator">18.6 / 3</gadget>
<output>6.2</output>

<result>6.2</result>