Update README.md

Author: dpakdev02-dev

README.md

@@ -15,7 +15,8 @@ A basic calculator web application that performs simple arithmetic operations su
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 ## 📸 Screenshot
-(Add a screenshot of your calculator UI here)
+<img width="462" height="617" alt="image" src="https://github.com/user-attachments/assets/219854d2-b0c0-4b1d-90a7-b672097dd163" />
+
 
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