The perimeter of an equilateral triangle is equal to the perimeter of a circle with a diameter of 6 decimeters. What is the side length of this equilateral triangle?
一个等边三角形的周长与一个直径为6分米的圆的周长相等，这个等边三角形的边长是多少分米．
<gadget id="calculator">6 / 3</gadget>
<output>2</output>

<gadget id="calculator">3.14 * 2</gadget>
<output>6.28</output>

<result>6.28</result>