diff --git a/WebApplicationLesson1/Controllers/CalculatorController.cs b/WebApplicationLesson1/Controllers/CalculatorController.cs
new file mode 100644
index 0000000..23472d9
--- /dev/null
+++ b/WebApplicationLesson1/Controllers/CalculatorController.cs
@@ -0,0 +1,16 @@
+using Microsoft.AspNetCore.Mvc;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+
+namespace WebApplicationLesson1.Controllers
+{
+    public class CalculatorController : Controller
+    {
+        public string Index(int a, int b)
+        {
+            return $"{a} + {b} = {a + b}";
+        }
+    }
+}
\ No newline at end of file
diff --git a/WebApplicationLesson1/Startup.cs b/WebApplicationLesson1/Startup.cs
index d9a1eb0..f3a790a 100644
--- a/WebApplicationLesson1/Startup.cs
+++ b/WebApplicationLesson1/Startup.cs
@@ -3,10 +3,6 @@
 using Microsoft.Extensions.Configuration;
 using Microsoft.Extensions.DependencyInjection;
 using Microsoft.Extensions.Hosting;
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Threading.Tasks;
 
 namespace WebApplicationLesson1
 {
@@ -45,8 +41,8 @@ public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
             app.UseEndpoints(endpoints =>
             {
                 endpoints.MapControllerRoute(
-                    name: "default",
-                    pattern: "{controller=Home}/{action=Index}/{id?}");
+                name: "default",
+                pattern: "{controller=Home}/{action=Index}/{a?}/{b?}");
             });
         }
     }