def operate(operator, *args):
    operator = operator
    counter = 0
    result = 0

    if operator == '+':
        for i in args:
            result += i
        return result

    elif operator == '-':
        for i in args:
            if counter == 0:
                result = i
                counter += 1
                continue
            result -= i
        return result

    elif operator == '*':
        result = 1
        for i in args:
            result *= i
        return result

    elif operator == '/':
        for i in args:
            if counter == 0:
                result = i
                counter += 1
                continue
            result /= i
        return result

print(operate("/", 10, 5))