DIGITALLY FILE EXTRACTION OPTIMISED WITH GPT-4O BASED MOBILE APPLICATION FOR RELEVANT EXERCISE PROBLEM GENERATION. jitk [Internet]. 2025 Feb. 28 [cited 2026 Feb. 11];10(3):719-27. Available from: https://ejournal.nusamandiri.ac.id/ejurnal/index.php/jitk/article/view/6101