If the length of an arc accounts for (5/12) of the circumference of the circle, what is the central angle subtended by this arc?
一条弧长占所在圆周长的(5/12)，那么这条弧所对的圆心角是多少度．
<gadget id="calculator">5 / 12</gadget>
<output>5/12 = around 0.416667</output>

<gadget id="calculator">360 * (5/12)</gadget>
<output>150</output>

<result>150</result>