Original sentence: The "09 F9" key is an ordinary number most widely known by its hexadecimal representation; in decimal notation, it is written 13,256,278,887,989,457,651,018,865,901,401,704,640
Edited sentence: The "09 F9" key is an ordinary number most widely known by its hexadecimal representation; in ordinary (decimal) notation, it is written 13,256,278,887,989,457,651,018,865,901,401,704,640