def addition_funktion(value1, value2):
    return value1 + value2


def subtraction_funktion(value1, value2):
    return value1 - value2


def multiplication_funktion(value1, value2):
    return value1 * value2


def division_funktion(value1, value2):
    return float(value1) / value2


def main():
    a = 5
    b = 10

    print addition_funktion(a, b)
    print addition_funktion(1, 2)
    print subtraction_funktion(3, 2)
    print multiplication_funktion(2, 3)
    print division_funktion(7, 5)


if __name__ == "__main__":
    main()
