Two sectors with equal radii, and the arc length of one sector is (1/3) the arc length of the other sector, then the central angle of this sector is the central angle of the other sector
两个半径相等的扇形，其中一个扇形的弧长是另一个扇形弧长的(1/3)，那么这个扇形的圆心角度数是另一个扇形圆心角的多少
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<result>1/3 = around 0.333333</result>