"Naught Point Fifty-Six" vs. "Naught Point Five Six": Which is More Formal?

""Naught point fifty-six" is more formal. While both phrases convey the same numerical value, "naught point fifty-six" follows traditional conventions of formal writing. "Naught" is a more formal word than "zero", and spelling out the number "fifty-six" instead of using the numeral "56" contributes to a more polished and sophisticated tone. "Naught point five six" might be considered more informal or casual in certain contexts, particularly in spoken language or less formal writing.