faulty ‍ Calc using pythoon

print("Enter Operator:")
a=input()
if a == "+" :
    print("your wana add:")
    print("num 1:")
    a=int(input())
    print("num 2:")
    b=int(input())
    if a == 45 and b == 4:
        print("Ans is : ",a,"+",b,"=", 50)
        print("enter value for continue")
    else:
        print("Ans is:",a+b)

print("for Continue enter operator:")
a=input("Enter Operator:")
if a == "-":
    print("your wana subtact:")
    a=int(input("num 1:"))
    b=int(input("num 2:"))
    if a == 15 and b == 4:
        print("Ans is :",10)
    else:
        print("Ans is:",a-b)

print("for Continue enter operator:")
a=input("Enter Operator:")
if a == "*":
    print("your wana Multiplication:")
    a=int(input("Enter num 1:"))
    b=int(input("Enter num 2:"))
    if a == 19 and b == 4:
        print("Ans is :",23)
    else:
        print("Ans is:",a*b)        
print("for Continue enter operator:")
a=input("Enter Operator:")    
if a == "/":
    print("your wana Division:")
    a=int(input("Enter num 1:"))
    b=int(input("Enter num 2:"))
    if a == 100 and b == 4:
        print("Ans is :",22)
    else:
        print("Ans is:",a/b)