diff --git a/WebApplicationLesson1/Controllers/CalculatorController.cs b/WebApplicationLesson1/Controllers/CalculatorController.cs
new file mode 100644
index 0000000..475bcff
--- /dev/null
+++ b/WebApplicationLesson1/Controllers/CalculatorController.cs
@@ -0,0 +1,21 @@
+using Microsoft.AspNetCore.Mvc;
+
+namespace WebApplicationLesson1.Controllers
+{
+    public class CalculatorController : Controller
+    {
+        public string Index(int a, int b, string c = "+")
+        {
+            switch (c)
+            {
+                case "+":
+                    return $"{a} + {b} = {a + b}";
+                case "-":
+                    return $"{a} - {b} = {a - b}";
+                case "*":
+                    return $"{a} * {b} = {a * b}";
+            }
+            return "Операция не конает";
+        }
+    }
+}
\ No newline at end of file
diff --git a/WebApplicationLesson1/Startup.cs b/WebApplicationLesson1/Startup.cs
index d9a1eb0..7dfc5ae 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}/{a?}/{b?}/{c?}");
             });
         }
     }