#Write a program that reads 7 real numbers. Each number indicates the Fahrenheit 
#temperature for one day. The program finds and prints the average Celsius 
#temperature for these 7 days. Use the following formula to convert Fahrenheit 
#to Celsius: Celsius = (5/9)*(Fahrenheit-32)

#we will write function c_to_f that has one parameter Fahrenheit and it finds 
#and retuns the corresponding Celsius using the formula Celsius = (5/9)*(Fahrenheit-32)

def c_to_f(F):
	return (5/9)*(F-32)
def main():
	sum=0
	for i in range(7):
		F=float(input("enter Fahrenheit "))
		C=c_to_f(F)
		print("Celsius is", C)
		sum=sum+C
	print("average Celsius is", sum/7)
main()