diff --git a/src/multiplication.c b/src/multiplication.c
index a162d6b..201093f 100644
--- a/src/multiplication.c
+++ b/src/multiplication.c
@@ -96,5 +96,10 @@ int multiply_using_modulo(int num1, int num2, int modulo) {
     return (num1 % modulo) * (num2 % modulo) % modulo;
 }
 
+int multiply_by_prime(int num, int prime) {
+    return num * (prime - 1) + num;
+}
+
+
     
 
diff --git a/src/multiplication.h b/src/multiplication.h
index a0d92dd..26da04e 100644
--- a/src/multiplication.h
+++ b/src/multiplication.h
@@ -15,6 +15,7 @@ int multiply_by_even(int num, int factor);
 int multiply_using_lookup_table(int num1, int num2);
 int multiply_using_logical_operations(int num1, int num2);
 int multiply_using_modulo(int num1, int num2, int modulo);
+int multiply_by_prime(int num, int prime);
 
 
 #endif // MULTIPLICATION_H