A (bad) example on Python's OOP, both showing its OOP ability, and showing that not all problems needs implementation of OOP concept.

python_oop_gcd.py

class GCDCalculator:
    def __init__(self, x, y):
        self.x = x
        self.y = y
        self.gcd = self.gcd_function(x, y)
    def gcd_function(self, x, y):
        while y:
            x, y = y, x%y
        return x

x = int(input())
y = int(input())
xy_gcd_object = GCDCalculator(x, y)
print(xy_gcd_object.gcd)