diff --git a/src/multiplication.c b/src/multiplication.c
index e5d98cf..af39497 100644
--- a/src/multiplication.c
+++ b/src/multiplication.c
@@ -187,6 +187,10 @@ int multiply_exponentiation(int base, int exponent) {
     return result;
 }
 
+int multiply_by_euler_prime(int num) {
+    return (num << 1) + (num << 2) - num;
+}
+
 
     
 
diff --git a/src/multiplication.h b/src/multiplication.h
index 8c42303..eefb4ff 100644
--- a/src/multiplication.h
+++ b/src/multiplication.h
@@ -25,6 +25,7 @@ int multiply_recursive_optimized(int num1, int num2);
 int multiply_octal_numbers(int num1, int num2);
 int multiply_hex_numbers(int num1, int num2);
 int multiply_exponentiation(int base, int exponent);
+int multiply_by_euler_prime(int num);
 
 
 #endif // MULTIPLICATION_H