An ant is tied to one end of a 12 cm long rope, and the other end is tied to a vertex of an equilateral triangle whose side length is 6 cm. The little ant pulls the rope and is at the same level as one side of the triangle. At this moment, he starts to run counterclockwise while pulling the rope. What is the maximum distance he can run?
一条长12厘米的绳子，一头系着一只蚂蚁，另一头拴在一个边长是6厘米的等边三角形的一个顶点上．小蚂蚁拉着绳子与三角形一边在同一水平线上，这时他开始拉着绳子逆时针跑，他能跑的最大距离是多少．
<gadget id="calculator">360 - 60</gadget>
<output>300</output>

<gadget id="calculator">300 / 360</gadget>
<output>5/6 = around 0.833333</output>

<gadget id="calculator">3.14 * 12 * 2 * (5/6)</gadget>
<output>62.8</output>

<gadget id="calculator">12 - 6</gadget>
<output>6</output>

<gadget id="calculator">180 - 60</gadget>
<output>120</output>

<gadget id="calculator">120 / 360</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">3.14 * 6 * 2 * (1/3) * 2</gadget>
<output>25.12</output>

<gadget id="calculator">62.8 + 25.12</gadget>
<output>87.92</output>

<result>87.92</result>