diff --git a/WebApplicationLesson1/Controllers/CalculatorController.cs b/WebApplicationLesson1/Controllers/CalculatorController.cs
new file mode 100644
index 0000000..21e0e56
--- /dev/null
+++ b/WebApplicationLesson1/Controllers/CalculatorController.cs
@@ -0,0 +1,12 @@
+using Microsoft.AspNetCore.Mvc;
+
+namespace WebApplicationLesson1.Controllers
+{
+    public class CalculatorController : Controller
+    {
+        public string Index(int num1, int num2)
+        {
+            return $"{num1} + {num2} = {num1 + num2}";
+        }
+    }
+}
diff --git a/WebApplicationLesson1/Startup.cs b/WebApplicationLesson1/Startup.cs
index d9a1eb0..4e2f31e 100644
--- a/WebApplicationLesson1/Startup.cs
+++ b/WebApplicationLesson1/Startup.cs
@@ -46,7 +46,7 @@ public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
             {
                 endpoints.MapControllerRoute(
                     name: "default",
-                    pattern: "{controller=Home}/{action=Index}/{id?}");
+                    pattern: "{controller=Home}/{action=Index}/{num1?}/{num2?}");
             });
         }
     }