In a fan-shaped statistical chart, if the central angle of the sector representing the green area is 72 degrees, then the green area is equal to the total area of the school.
在一幅扇形统计图中，表示绿地面积的扇形的圆心角是72度，则绿地面积站学校总面积的多少．
<gadget id="calculator">72 / 360</gadget>
<output>1/5 = around 0.2</output>

<result>1/5 = around 0.2</result>