diff --git a/04-java-oop-basic/task03/src/com/example/task03/Task03Main.java b/04-java-oop-basic/task03/src/com/example/task03/Task03Main.java
index 5734746d7..fc34b75bc 100644
--- a/04-java-oop-basic/task03/src/com/example/task03/Task03Main.java
+++ b/04-java-oop-basic/task03/src/com/example/task03/Task03Main.java
@@ -1,7 +1,28 @@
 package com.example.task03;
 
-public class Task03Main {
-    public static void main(String[] args) {
+public class ComplexNumber
+{
+    private float re = 0;
+    private float im = 0;
 
+    public ComplexNumber(float realPartOf, float imaginaryPart)
+    {
+        this.re = realPartOf;
+        this.im = imaginaryPart;
     }
-}
+
+    public ComplexNumber sum(ComplexNumber number)
+    {
+        return new ComplexNumber(this.re + number.re, this.im + number.im);
+    }
+
+    public ComplexNumber mult(ComplexNumber number)
+    {
+        return new ComplexNumber(this.re * number.re - this.im * number.im, this.im * number.re - this.re * number.im);
+    }
+
+    public String toString()
+    {
+        return re + ((im < 0) ? im + "i" : "+" + im + "i");
+    }
+}
\ No newline at end of file