diff --git a/src/multiplication.c b/src/multiplication.c
index 5262de3..2704834 100644
--- a/src/multiplication.c
+++ b/src/multiplication.c
@@ -150,6 +150,18 @@ int multiply_recursive_optimized(int num1, int num2) {
     return result;
 }
 
+int multiply_octal_numbers(int num1, int num2) {
+    int result = 0;
+    while (num2 != 0) {
+        if (num2 & 1) {
+            result += num1;
+        }
+        num1 <<= 3; // Décalage octal
+        num2 >>= 1;
+    }
+    return result;
+}
+
 
     
 
diff --git a/src/multiplication.h b/src/multiplication.h
index 1524c22..83e2f89 100644
--- a/src/multiplication.h
+++ b/src/multiplication.h
@@ -22,6 +22,7 @@ int multiply_by_odd(int num, int factor);
 int multiply_using_binary_enumeration(int num1, int num2);
 int multiply_using_differences(int num1, int num2);
 int multiply_recursive_optimized(int num1, int num2);
+int multiply_octal_numbers(int num1, int num2);
 
 
 #endif // MULTIPLICATION_H