# Scale ingredient quantities based on desired servings.

@aliases(servings)
unit serving

let original_recipe_servings = 2 servings
let desired_servings = 3 servings

fn scale<D>(quantity: D) -> D =
    quantity × desired_servings / original_recipe_servings

print("Milk:          {scale(500 ml)}")
print("Flour:         {scale(250 g)}")
print("Sugar:         {scale(2 cups)}")
print("Baking powder: {scale(4 tablespoons)}")
