diff --git a/pom.xml b/pom.xml
index 05924f0..3f9ce28 100644
--- a/pom.xml
+++ b/pom.xml
@@ -3,12 +3,14 @@
    <modelVersion>4.0.0</modelVersion>
    <groupId>com.ravi.cal</groupId>
    <artifactId>RaviCalculator</artifactId>
-   <version>0.1.2-SNAPSHOT</version>
+   <version>2.0-SNAPSHOT</version>
    <packaging>jar</packaging>
    <name>RaviCalculator</name>
    <url>http://maven.apache.org</url>
    <properties>
       <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+      <maven.compiler.source>17</maven.compiler.source>
+      <maven.compiler.target>17</maven.compiler.target>
    </properties>
    <dependencies>
       <dependency>
@@ -18,5 +20,22 @@
          <scope>test</scope>
       </dependency>
    </dependencies>
-   
+   <build>
+      <plugins>
+         <plugin>
+            <!-- Building an executable jar -->
+            <groupId>org.apache.maven.plugins</groupId>
+            <artifactId>maven-jar-plugin</artifactId>
+            <version>3.1.0</version>
+            <configuration>
+               <archive>
+                  <manifest>
+                     <!-- give full qualified name of your main class-->
+                     <mainClass>com.ravi.cal.RaviCalculator.Calculator</mainClass>
+                  </manifest>
+               </archive>
+            </configuration>
+         </plugin>
+      </plugins>
+   </build>
 </project>
diff --git a/src/main/java/com/ravi/cal/RaviCalculator/Calculator.java b/src/main/java/com/ravi/cal/RaviCalculator/Calculator.java
index 8dcaacd..21e96df 100644
--- a/src/main/java/com/ravi/cal/RaviCalculator/Calculator.java
+++ b/src/main/java/com/ravi/cal/RaviCalculator/Calculator.java
@@ -17,20 +17,23 @@ public long getFirst() {
 	public long getSecond() {
 		return second;
 	}
-
+	
+	// Addition Function
 	public long addFucn(long first, long second){
 		
 		return first+second;
 	}
 	
+	// Difference 
 	public long subFucn(long first, long second){
 		
 		return second-first;
 	}
 	
+	// Product - *
 	public long mulFucn(long first, long second){
 		
-		return first/second;
+		return first*second;
 	}
 	
 	
diff --git a/src/test/java/com/ravi/cal/RaviCalculator/CalculatorTest.java b/src/test/java/com/ravi/cal/RaviCalculator/CalculatorTest.java
deleted file mode 100644
index 69e913d..0000000
--- a/src/test/java/com/ravi/cal/RaviCalculator/CalculatorTest.java
+++ /dev/null
@@ -1,26 +0,0 @@
-package com.ravi.cal.Calculator;
-
-import com.ravi.cal.RaviCalculator.Calculator;
-import org.junit.Test;
-import static org.junit.Assert.assertEquals;
-
-public class CalculatorTest {
-	
-	Calculator cal = new Calculator(2, 3);
-	
-    @Test
-    public void twoAndThreeIsFive() throws Exception {
-    	assertEquals(cal.addFucn(2, 3),5);
-    }
-
-    @Test
-    public void threeMinusTwoIsOne() throws Exception {
-        assertEquals(cal.subFucn(2, 3),1);
-    }
-    
-    @Test
-    public void threeXThreeIsNine() throws Exception {
-        assertEquals(cal.mulFucn(3, 3), 9);
-    }
-   
-}