Cut a circle made of thin iron wire into three arcs A, B, and C. The length of arc A is (1/2) the length of arc B, and the length of arc C is three times the length of arc A. Then the longest arc is What is the central angle of .
将一细铁丝做成的圆圈剪成A、B、C三段弧，A弧长是B弧长的(1/2)，C弧长是A弧长的3倍，则最长弧所对的圆心角是多少度．
<gadget id="calculator">1 + 2 + 3</gadget>
<output>6</output>

<gadget id="calculator">3 / 6</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">360 * (1/2)</gadget>
<output>180</output>

<result>180</result>