diff --git a/src/main/java/com/ap/BasicCalculator.java b/src/main/java/com/ap/BasicCalculator.java
index 4852598..dc7220e 100644
--- a/src/main/java/com/ap/BasicCalculator.java
+++ b/src/main/java/com/ap/BasicCalculator.java
@@ -12,7 +12,12 @@ public class BasicCalculator implements Calculator {
     }
 
     @Override
-    public int multiply(int a, int b) {
+    public int product(int a, int b) {
+        return a * b;
+    }
+
+    @Override
+    public double calculateArea(double a, double b) {
         return a * b;
     }
 }
\ No newline at end of file
diff --git a/src/main/java/com/ap/Calculator.java b/src/main/java/com/ap/Calculator.java
index 0220dcb..7e75f89 100644
--- a/src/main/java/com/ap/Calculator.java
+++ b/src/main/java/com/ap/Calculator.java
@@ -3,5 +3,6 @@ package com.ap;
 public interface Calculator {
     int add(int a, int b);
     int subtract(int a, int b);
-    int multiply(int a, int b);
+    int product(int a, int b);
+    double calculateArea(double a, double b);
 }
\ No newline at end of file
diff --git a/src/main/java/com/ap/MathHelper.java b/src/main/java/com/ap/MathHelper.java
index d624768..405afae 100644
--- a/src/main/java/com/ap/MathHelper.java
+++ b/src/main/java/com/ap/MathHelper.java
@@ -1,7 +1,7 @@
 package com.ap;
 
 public class MathHelper {
-    public static int multiply(int a, int b) {
+    public static int product(int a, int b) {
         return a * b;
     }
 
diff --git a/src/main/java/com/ap/ReportGenerator.java b/src/main/java/com/ap/ReportGenerator.java
index 2201769..16282d5 100644
--- a/src/main/java/com/ap/ReportGenerator.java
+++ b/src/main/java/com/ap/ReportGenerator.java
@@ -5,7 +5,7 @@ public class ReportGenerator {
         Calculator calc = new BasicCalculator();
         int sum = calc.add(x, y);
         int diff = calc.subtract(x, y);
-        int product = calc.multiply(x, y);
+        int product = calc.product(x, y);
         int max = MathHelper.max(x, y);
         System.out.println("Sum: " + sum + ", Diff: " + diff +
                 ", Product: " + product + ", Max: " + max);
diff --git a/src/test/java/CalculatorTest.java b/src/test/java/CalculatorTest.java
index 93d2bbf..65c4056 100644
--- a/src/test/java/CalculatorTest.java
+++ b/src/test/java/CalculatorTest.java
@@ -19,8 +19,8 @@ public class CalculatorTest {
     }
 
     @Test
-    void testMultiply() {
+    void testProduct() {
         Calculator calc = new BasicCalculator();
-        assertEquals(6, calc.multiply(2, 3));
+        assertEquals(6, calc.product(2, 3));
     }
 }
\ No newline at end of file