The size of a sector is exactly (1/5) of the circle on which it is located. What is the central angle of the sector?
一个扇形的大小正好是它所在圆的(1/5)，这个扇形的圆心角是多少°
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">360 * (1/5)</gadget>
<output>72</output>

<result>72</result>