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 while True:     print()     print("Welcome Basic Maths Caculator")     print()     try:         a = int(input("Enter the Number of A : "))         print()         b = int(input("Enter the Number of B : "))         print("\nAnswers : -")         print("\nTotal : ",a+b)         print()         print("Difference : ",a-b)         print()         print("Product : ",a*b)         print()         print("\nQuotient : ",a/b)         print()         print("Whole Number : ",a//b)         print()         print("Remainder : ",a%b)         print()         print("Divisor : ",b)         print()         print("Dividend : ",a)         print()              except Exception:         print("\nError : Enter Number Only")

 class Calculator():     def __init__(self,a,b):         self.a = a         self.b = b     def add(self):         print()         print("Total :",self.a+self.b)     def sub(self):         print("Difference :",self.a-self.b)     def mul(self):         print("Product :",self.a*self.b)     def div(self):         print()         print("Quotient :",self.a/self.b)         print("Remainder :",self.a%self.b) class Display(Calculator):    def __init__(self,a,b):        super().__init__(a,b)        self.add()        self.sub()        self.mul()        self.div()         a = int(input("Enter the Number of A : ")) b = int(input("Enter the Number of B : ")) display = Display(a,b)