a = 4.0
b = 8.0
c = 3.5
d = 97.0
e = 123.0
f = 490.0
mainvar1 = b
mainvar2 = f
v1 = 'Variable 1,'
v2 = 'Variable 2,'
v3 = 'is greater than'
period = '.'

def area1(radius):
    area1r = 3.14159 * mainvar1**2
    return area1r
    print area1r

def area2(radius):
    area2r = 3.14159 * mainvar2**2
    return area2r
    print area2r
    

def return_difference_of12(var1,var2):
    if var1 - var2 > 0:
        y = v1,var1,v3,v2,var2,period
        print y
    elif var2 - var1 > 0:
        z = v2,var2,v3,v2,var1,period
        print z

area1(mainvar1)
area2(mainvar2)
return_difference_of12(mainvar1,mainvar2)