이번문제는 간단한 수식을 넣는 문제인것 같다. /** * The program should calculate how much water, coffee, and milk are necessary to make the specified amount of coffee. * One cup of coffee made on this coffee machine contains * 200 ml of water, * 50 ml of milk, and * 15 g of coffee beans. * * The user should input the amount of coffee he needs, in cups, for all the guests. * * Of course, all this coffee is not neede..