second PR

src/main/java/Calculated.java

@@ -76,4 +76,5 @@ public Product(String name, double price) {
         this.name = name;
         this.price = price;
     }
+
 }

src/main/java/Input.java

@@ -3,7 +3,6 @@
 public class Input {
     private final Scanner scanner = new Scanner(System.in);
 
-
     public void quantityOfPeople() {
         Calculated calculated = new Calculated();
 

src/main/java/Main.java

@@ -1,5 +1,6 @@
 
 public class Main {
+
     public static void main(String[] args) {
         Input input = new Input();
         input.quantityOfPeople();

src/main/java/TotalAmountSplitter.java

@@ -3,11 +3,27 @@ public class TotalAmountSplitter {
     public static void calculatePerPerson(double totalAmount, int quantity) {
         double perPersonAmount = totalAmount / quantity;
 
+        double roundedAmount = Math.floor(perPersonAmount * 100) / 100;
+
         String formattedAmount;
-        if (perPersonAmount == Math.floor(perPersonAmount)) {
-            formattedAmount = String.format("%.0f рубль", perPersonAmount);
+        boolean isSpecialCase = Math.floor(roundedAmount * 100) % 100 >= 11 && Math.floor(roundedAmount * 100) % 100 <= 19;
+
+        if (!isSpecialCase) {
+            int lastDigit = (int) (roundedAmount * 100 % 10);
+            switch (lastDigit) {
+                case 1:
+                    formattedAmount = String.format("%.2f рубль", roundedAmount);
+                    break;
+                case 2:
+                case 3:
+                case 4:
+                    formattedAmount = String.format("%.2f рубля", roundedAmount);
+                    break;
+                default:
+                    formattedAmount = String.format("%.2f рублей", roundedAmount);
+            }
         } else {
-            formattedAmount = String.format("%.2f рубля", perPersonAmount).replace(".", ",");
+            formattedAmount = String.format("%.2f рублей", roundedAmount);
         }
 
         System.out.println("Каждый человек должен заплатить: " + formattedAmount);