circle's area and perimeter finder.py

r=float(input("enter circle's radian :-"))
def area_of_circle(rad):
    return 22/7*rad*rad
def perimeter_of_circle(rad):
    return 2*22/7*rad
print("circle's area ="+ str(area_of_circle(r)))
print("circle's peimeter ="+str(perimeter_of_circle(r)))