Update README.md

Author: ashish8513

README.md

@@ -55,6 +55,7 @@ Collaboration: Engage with the community for support and feedback.
 
 ![Second loading Page](https://github.com/ashish8513/30-days-javascript-leetCode-challenges/blob/main/30%20png.png)
 4th day I have found new error 
+Today's error relates to division by zero in the Calculator class. When dividing by zero, the program correctly throws an error, but the test system is likely checking for exact logic implementation and method chaining. Fixing the issue involves ensuring all methods return this for chaining and that errors are properly handled and not re-thrown unnecessarily during chained operations.
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   <img src="https://github.com/ashish8513/30-days-javascript-leetCode-challenges/blob/main/erroe.png" alt="Visual Studio" width="600"/>
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