Cut a circular piece of paper into three fan shapes A, B, and C. It is known that the area of A is smaller (1/3) than that of B, and the area of B is smaller (1/4) than that of C. Then What is the central angle of the sector with the smallest area?
将一张圆形纸片剪开成A，B，C三个扇形，已知A的面积比B的面积小(1/3)，B的面积比C的面积小(1/4)，则其中面积最小的扇形的圆心角是多少度．
<gadget id="calculator">2 + 3 + 4</gadget>
<output>9</output>

<gadget id="calculator">2 / 9</gadget>
<output>2/9 = around 0.222222</output>

<gadget id="calculator">360 * (2/9)</gadget>
<output>80</output>

<result>80</result>