diff --git a/WebApplicationLesson1/Controllers/CalculatorController.cs b/WebApplicationLesson1/Controllers/CalculatorController.cs
new file mode 100644
index 0000000..aa272c6
--- /dev/null
+++ b/WebApplicationLesson1/Controllers/CalculatorController.cs
@@ -0,0 +1,22 @@
+using Microsoft.AspNetCore.Mvc;
+
+namespace WebApplicationLesson1.Controllers
+{
+    public class CalculatorController : Controller
+    {
+        public string Index(double a, double b, char c)
+        {            
+            if (c == '*')
+                return $"{a} {c} {b} = {a * b}";
+            if (c == '-')
+                return $"{a} {c} {b} = {a - b}";
+            if (c == '/' && b != 0)
+                return $"{a} {c} {b} = {a / b}";
+            if (c == '/' && b == 0)
+                return "Ошибка: деление на ноль.";
+            if (c != '+' && c != 0)
+                return "Некорректная операция.";
+            return $"{a} + {b} = {a + b}";
+        }
+    }
+}
diff --git a/WebApplicationLesson1/Startup.cs b/WebApplicationLesson1/Startup.cs
index d9a1eb0..442d7c6 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}/");
             });
         }
     }