diff --git a/WebApplicationLesson1/Controllers/CalkaulatorController.cs b/WebApplicationLesson1/Controllers/CalkaulatorController.cs
new file mode 100644
index 0000000..2e1cf27
--- /dev/null
+++ b/WebApplicationLesson1/Controllers/CalkaulatorController.cs
@@ -0,0 +1,24 @@
+using Microsoft.AspNetCore.Mvc;
+
+namespace WebApplicationLesson1.Controllers
+{
+    public class CalculatorController : Controller
+    {
+        public string Index(int a = 0, int b = 0, string c = "+")
+        {
+            switch (c)
+            {
+                case "+":
+                    return $"{a} + {b} = {a + b}";
+                case "-":
+                    return $"{a} - {b} = {a - b}";
+                case "*":
+                    return $"{a} * {b} = {a * b}";
+                case "/":
+                    return $"{a} / {b} = {a / b}";
+                default:
+                    return "не по кону";
+            }
+        }
+    }
+}
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