# complete the fooditem class by adding a constructor to initalize a food item. The constructor should initailize the name (a string) 
# To water and all other instance attributes to 0.0 by default 

#If the constructor is called with a food name, grams of fat, grams of carbohydrates and grams of protein, the constructor should assign each instance 
# attribute with the appropriate parameter value. 

class FoodItem: 
    #Constructor with defaults
    def__init__(self, name="Water", fat=0.0, carbs=0.0, protein=0.0): 
        self.name = name 
        self.fat = float(fat)
        self.carbs = float(carbs)
        self.protein = float(protein)

    def get_calories(self, num_servings): 
        # calories per serving 
        calories_per_serving = (self.fat * 9) + (self.carbs * 4) + (self.protein * 4)
        return calories_per_serving * num_servings 

    def print_info(self): 
        print(f'Nutritional information per serving of {self.name}:')
        print(f' Fat: {self.fat:.2f} g')
        print(f' Carbohydrates: {self.carbs:.2f} g')
        print(f' Protein: {self.protein:.2f} g')


if__name == "__main__": 
    item_name = input()
    if item_name == 'Water' or item_name == 'water': 
        #Uses constructor defaults 
        food_item = FoodItem()
        food_item.print_info()
        print(f 'Number of calories for {1.0:.2f} servings(s): {food_itme.get_calories(1.0):.2f}')
    else: 
        amount_fat = float(input())
        amount_carbs = float(input())
        amount_protein = float(input())
        num_servings = float(input())

      food_item = FoodItem(item_name, amount_fat, amount_carbs, amount_protein)
        food_item.print_info()
        print(f'Number of calories for {1.0:.2f} serving(s): {food_item.get_calories(1.0):.2f}')
        print(f'Number of calories for {num_servings:.2f} serving(s): {food_item.get_calories(num_servings):.2f}')