namespace Calculator {
    class FloatCalculator {
        + add(firstOperand : float, secondOperand : float): float
        + subtract(firstOperand : float, secondOperand : float): float
        + multiply(firstOperand : float, secondOperand : float): float
        + divide(firstOperand : float, secondOperand : float): float
        + modulus(firstOperand : float, secondOperand : float): float
        + sum(float ...floats): float
    }
}