If the length of an arc is (3/5) of the circumference of the circle, what is the central angle of the arc?
一弧长是所在圆周长的(3/5)，那么该弧所对圆心角为多少°
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">360 * (3/5)</gadget>
<output>216</output>

<result>216</result>