diff --git a/src/multiplication.c b/src/multiplication.c
index e222e4d..e8e4602 100644
--- a/src/multiplication.c
+++ b/src/multiplication.c
@@ -112,5 +112,14 @@ int multiply_by_prime_and_its_square(int num, int prime) {
     return num * (prime + square (prime));
 }
 
+int multiply_by_odd(int num, int factor) {
+    int result = 0;
+    for (int i = 0; i < factor; ++i) {
+        result += num;
+    }
+    return result;
+}
+
+
     
 
diff --git a/src/multiplication.h b/src/multiplication.h
index bd20e4a..ff24d5e 100644
--- a/src/multiplication.h
+++ b/src/multiplication.h
@@ -18,6 +18,7 @@ int multiply_using_modulo(int num1, int num2, int modulo);
 int multiply_by_prime(int num, int prime);
 int multiply_using_increment(int num1, int num2);
 int multiply_by_prime_and_its_square(int num, int prime);
+int multiply_by_odd(int num, int factor);
 
 
 #endif // MULTIPLICATION_H