There are two points A and B on a circle with a diameter of 8 cm, and the arc length of \widehat{AB} is 4.396 cm, then what is the central angle of \widehat{AB}?
在直径为8厘米的圆上有A与B两点，\widehat{AB}的弧长是4.396厘米，那么\widehat{AB}所对的圆心角是多少°
<gadget id="calculator">8 / 2</gadget>
<output>4</output>

<gadget id="calculator">3.14 * 4</gadget>
<output>12.56</output>

<gadget id="calculator">4.396 / 12.56</gadget>
<output>0.35</output>

<gadget id="calculator">0.35 * 180</gadget>
<output>63</output>

<result>63</result>