diff --git a/sk2/main.c b/sk2/main.c
new file mode 100644
index 0000000..0060ade
--- /dev/null
+++ b/sk2/main.c
@@ -0,0 +1,35 @@
+#include "calculator.h"
+#include <math.h>
+
+int main() {
+    char expression[100];
+    int configuration;
+    double result;
+
+        printf("Select configuration:\n");
+        printf("1. Simple expressions\n");
+        printf("2. Higher expressions\n");
+        printf("3. Exit\n");
+        printf("Enter your choice: ");
+        scanf("%d", &configuration);
+
+        if (configuration == 3) {
+            printf("Exiting...\n");
+            return 0;
+        }
+
+        if (configuration > 3) {
+            printf("Invalid configuration: %d\n", configuration);
+            return 0;
+        }
+
+        printf("Enter result: ");
+        fgets(expression, sizeof(expression), stdin);
+        scanf("%[^\n]", expression);
+
+        result = evaluateExpression(expression, configuration);
+
+        printf("Result: %.3f\n", result);
+
+    return 0;
+}
\ No newline at end of file