# To calculate area of circle whose radius is 7
r = 7
area_of_circle = 22/7*r*r
print(f"Answer : {area_of_circle} cm2\n")

# To convert fahrenheit into Celsius
f = input("Enter temperature in fahrenheit\n>> ")
f_to_c = (float(f)-32)*5/9
print(f"Answer : {f}°f = {f_to_c}°C")