Given that the radius of the circle is r=8cm and the arc length is 1=28.26cm, find the central angle n of the arc length.
已知圆的半径r=8cm，弧长1=28.26cm，求弧长所对的圆心角n．
<gadget id="calculator">180 * 28.26</gadget>
<output>5_086.8</output>

<gadget id="calculator">3.14 * 8</gadget>
<output>25.12</output>

<gadget id="calculator">5_086.8 / 25.12</gadget>
<output>202.5</output>

<result>202.5</result>