added type double to multiplication

src/arithmeticMultiplication_Double.c

@@ -0,0 +1,12 @@
+#include "stdlib.h"
+#include "arithmeticMultiplication_Double.h"
+
+
+double* multiplication_double(double num1, double num2) {
+    double* result = (double*)malloc(sizeof(double));
+    if (result == NULL) {
+        return NULL; // Handle memory allocation failure
+    }
+    *result = num1 * num2;
+    return result;
+}

src/arithmeticMultiplication_Double.h

@@ -0,0 +1,14 @@
+
+
+#ifndef THEADMIRALS_ARITHMETICMULTIPLICATION_DOUBLE_H
+#define THEADMIRALS_ARITHMETICMULTIPLICATION_DOUBLE_H
+
+
+
+
+
+double* multiplication_double(double num1, double num2);
+
+
+
+#endif //THEADMIRALS_ARITHMETICMULTIPLICATION_DOUBLE_H