diff --git a/src/main/java/src/TasksFrame.java b/src/main/java/src/TasksFrame.java
index 5b561fe..ed4f91f 100644
--- a/src/main/java/src/TasksFrame.java
+++ b/src/main/java/src/TasksFrame.java
@@ -18,13 +18,13 @@ public class TasksFrame extends JFrame {
         super("Unsere kleinen Tasks");
 
         setVisible(true);
-        setBounds(810,200, 300, 600);
-        setPreferredSize(new Dimension(300, 600));
+        setBounds(810,200, 400, 600);
+        setPreferredSize(new Dimension(400, 600));
         setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
         setResizable(false);
 
         JPanel root = new JPanel();
-        root.setBounds(0, 0, 300, 600);
+        root.setBounds(0, 0, 400, 600);
         root.setVisible(true);
 
         setContentPane(root);
@@ -35,7 +35,7 @@ public class TasksFrame extends JFrame {
         container.setLayout(new BoxLayout(container, BoxLayout.Y_AXIS));
 
         jScrollPane = new JScrollPane(container, JScrollPane.VERTICAL_SCROLLBAR_ALWAYS, JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
-        jScrollPane.setPreferredSize(new Dimension(300, 600));
+        jScrollPane.setPreferredSize(new Dimension(400, 600));
         root.add(jScrollPane);
 
     }
@@ -52,7 +52,7 @@ public class TasksFrame extends JFrame {
 
         JLabel jLabel = new JLabel(header);
         jLabel.setVisible(true);
-        jLabel.setBounds(3, 3, 160, 20);
+        jLabel.setBounds(3, 3, 300, 20);
 
         panel.add(jLabel);
 
@@ -67,6 +67,8 @@ public class TasksFrame extends JFrame {
 
         setupDiff();
 
+        setupArea();
+
         setupSumFromTo();
 
         setup5ModList(1, 20);
@@ -118,6 +120,12 @@ public class TasksFrame extends JFrame {
     }
 
 
+    public int calcMod(int n, int x)
+    {
+        int rest = n % x;
+        return rest;
+    }
+
     private void setupEulerschePhiFunk() {
 
         JPanel jPanel = setupPanel("Eulersche Phi Funktion");
@@ -311,6 +319,92 @@ public class TasksFrame extends JFrame {
         return a-b;
     }
 
+    public void setupArea()
+    {
+        JPanel jPanel = setupPanel("Area and perimeter of a Rectangle:");
+
+        JLabel jL1 = new JLabel();
+        jL1.setText("Side a:");
+        jL1.setVisible(true);
+        jL1.setBounds(0,20,50,30);
+
+        JLabel jL2 = new JLabel();
+        jL2.setText("Side b:");
+        jL2.setVisible(true);
+        jL2.setBounds(0,40,50,30);
+
+        JTextField a = new JTextField();
+        a.setVisible(true);
+        a.setBounds(50,25,30,20);
+
+        JTextField b = new JTextField();
+        b.setVisible(true);
+        b.setBounds(50,45,30,20);
+
+        JButton area = new JButton("Calculate area");
+        area.setVisible(true);
+        area.setBounds(0, 80, 180,30);
+
+        JTextField areaRes = new JTextField();
+        areaRes.setBounds(200,80,30,20 );
+        areaRes.setVisible(true);
+
+        area.addActionListener(new ActionListener() {
+            @Override
+            public void actionPerformed(ActionEvent e) {
+                String texta = a.getText();
+                String textb = b.getText();
+                Integer val_a = Integer.valueOf(texta);
+                Integer val_b = Integer.valueOf(textb);
+                Integer res = calcArea(val_a, val_b);
+                areaRes.setText(String.valueOf(res));
+            }
+        });
+
+        jPanel.add(jL1);
+        jPanel.add(jL2);
+        jPanel.add(a);
+        jPanel.add(b);
+        jPanel.add(area);
+        jPanel.add(areaRes);
+
+        JButton perimeter = new JButton("Calculate perimeter");
+        perimeter.setVisible(true);
+        perimeter.setBounds(0, 110, 180,30);
+
+        JTextField perimeterRes = new JTextField();
+        perimeterRes.setBounds(200,110,30,20 );
+        perimeterRes.setVisible(true);
+        perimeter.addActionListener(new ActionListener() {
+            @Override
+            public void actionPerformed(ActionEvent e) {
+                String texta = a.getText();
+                String textb = b.getText();
+                Integer val_a = Integer.valueOf(texta);
+                Integer val_b = Integer.valueOf(textb);
+                Integer res = calcPerimeter(val_a, val_b);
+                perimeterRes.setText(String.valueOf(res));
+            }
+        });
+
+        jPanel.add(perimeterRes);
+        jPanel.add(perimeter);
+
+    }
+
+    public int calcArea(int a, int b)
+    {
+        int area = a * b;
+        return area;
+    }
+
+    public int calcPerimeter(int a, int b)
+    {
+        int perimeter = 2 * (a+b);
+        return perimeter;
+    }
+
+
 
     public void setupSumFromTo(){
 
@@ -347,6 +441,7 @@ public class TasksFrame extends JFrame {
         jPanel.add(b);
         jPanel.add(result);
         jPanel.add(sumFromTo);
+
     }
 
     public int sumCalc(int from, int to) {
@@ -398,4 +493,6 @@ public class TasksFrame extends JFrame {
 
         return sum;
     }
+
+
 }
diff --git a/src/test/java/src/TasksFrameTest.java b/src/test/java/src/TasksFrameTest.java
index b9a277f..00e5c38 100644
--- a/src/test/java/src/TasksFrameTest.java
+++ b/src/test/java/src/TasksFrameTest.java
@@ -69,6 +69,40 @@ class TasksFrameTest {
         int ggt3 = tasksFrame.ggt(262, 599);
         assertEquals(1, ggt3);
     }
+    @Test
+    void setupArea()
+    {
+        TasksFrame tasksFrame = new TasksFrame();
+        int p1 = tasksFrame.calcArea(3,5);
+        assertEquals(15, p1);
+        int p2= tasksFrame.calcArea(0,7);
+        assertEquals(0,p2);
+
+    }
+
+    @Test
+    void setupPerimeter()
+    {
+        TasksFrame tasksFrame = new TasksFrame();
+        int p1 = tasksFrame.calcPerimeter(3,5);
+        assertEquals(16, p1);
+        int p2= tasksFrame.calcArea(0,7);
+        assertEquals(0,p2);
+
+    }
+
+    @Test
+    void setupMod()
+    {
+        TasksFrame tasksFrame = new TasksFrame();
+        int p1= tasksFrame.calcMod(5,3);
+        assertEquals(2,p1);
+        int p2 = tasksFrame.calcMod(4,2);
+        assertEquals(0,p2);
+        int p3= tasksFrame.calcMod(10,3);
+        assertEquals(1,p3);
+    }
+
     }