For an arc length s, area of sector A, and central angle

​ , R= 51.1 mi,

I know that the formula is A= R​ ​

I know that the formula looks like this for the problem

​/(51.1 mi)​

However when I type it into my calculator it is giving me the incorrect answers. Does anyone know what I am doing wrong or can anyone please help me figure this out?

 

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