def DivExp(a, b):
    assert a > 0

    try:
        c = a / b
        print("Quotient is", c)

    except ZeroDivisionError:
        print("Error: Denominator cannot be 0.")
        quit()

a = int(input("Numerator: "))
b = int(input("Denominator: "))
DivExp(a, b)