diff --git a/Program.cs b/Program.cs
index 433b0b5..ea504b9 100644
--- a/Program.cs
+++ b/Program.cs
@@ -1 +1,2 @@
-Console.WriteLine("foof");
+double r = 2.5;
+Console.WriteLine($"area of square with radius {r}: {double.Pi * Math.Pow(r, 2)}");