PROTEIN_KCAL = 4
CARB_KCAL = 4
FAT_KCAL = 9
FIBER_KCAL = 2


def calculate_calories(
    protein: float,
    carb: float,
    fat: float,
    fiber: float,
) -> float:
    return sum(
        (
            PROTEIN_KCAL * protein,
            CARB_KCAL * carb,
            FAT_KCAL * fat,
            FIBER_KCAL * fiber,
        )
    )