import math
class Spherical:

    def __init__(self,r):
        self.radius = r

    def changeR(self,Radius):
        self.radius = Radius

    def findVolume(self):
        return (4/3)*math.pi*pow(self.radius,3)

    def findArea(self):
        return 4*math.pi*pow(self.radius,2)

    def __str__(self):
        return 'Radius ='+str(self.radius)+ ' Volumn = '+str(self.findVolume()) +' Area = '+str(self.findArea())

r1, r2 = input("Enter R : ").split()
R1 = Spherical(int(r1))
print(type(R1))
print(dir(R1))
print(R1)
R1.changeR(int(r2))
print(R1)