During March 2025, Why8575 developed a currency conversion feature for the STD-INFO-COMPUTING-WEB-2024-12-25/06_JAVA repository, focusing on accurate Won-to-Euro calculations. Leveraging Java and object-oriented programming principles, Why8575 implemented the Won2Euro class with robust conversion logic and explicit handling of source and destination currency metadata. The approach included updating conversion rate management to ensure precise and auditable financial computations, supporting Euro-denominated reporting and workflows. Although the work spanned a single feature, the implementation demonstrated careful attention to traceability and documentation, laying a solid foundation for future multi-currency support within the project’s broader financial infrastructure.