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Cat.java

@@ -0,0 +1,8 @@
+package com.company;
+
+public class Cat extends Pet {
+    @Override
+    public void voice(){
+        System.out.println("I am a cat - Meow ");
+    }
+}

Cow.java

@@ -0,0 +1,8 @@
+package com.company;
+
+public class Cow extends Pet {
+    @Override
+    public void voice() {
+        System.out.println("I am a cow - Moo ");
+    }
+}

Dog.java

@@ -0,0 +1,8 @@
+package com.company;
+
+public class Dog extends Pet {
+    @Override
+    public void voice() {
+        System.out.println("I am a dog - Bark ");
+    }
+}

Main.java

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+package com.company;
+
+public class Main {
+
+    public static void main(String[] args) {
+
+    Math.multiplication();
+    Math.addition();
+    Math.subtraction();
+
+    System.out.println("");
+
+    Pet cat = new Cat();
+    Pet dog = new Dog();
+    Pet cow = new Cow();
+
+    cat.voice();
+    dog.voice();
+    cow.voice();
+
+}
+}

Math.java

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+package com.company;
+
+public class Math {
+    static final int A = 3;
+    static final int B = 4;
+    static final int C = 5;
+
+    static void multiplication(){
+        System.out.println("The result of multiplication is: " + (A*B*C));
+    }
+    static void addition(){
+        System.out.println("The result of addition is: " + (A+B+C));
+    }
+    static void subtraction(){
+        System.out.println("The result of subtraction is: " + (A-B-C));
+    }
+
+}

Pet.java

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+package com.company;
+
+public abstract class Pet {
+    public abstract void voice();
+
+}