If the sector accounts for 30% of the circle in the sector chart, what is the central angle of the sector at this time?
扇形统计图中扇形占圆的30%，则此时扇形所对的圆心角为多少．
<gadget id="calculator">30 / 100</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">360 * (3/10)</gadget>
<output>108</output>

<result>108</result>