How do you say 7-14-21-77 in spanish?

There's no single, universally accepted way to say "7-14-21-77" in Spanish because it depends on the context. The numbers could represent dates, codes, or something else entirely.

Here are a few possibilities:

* If they are dates (unlikely given the sequence): You would say each date individually. For example, "siete de [month], catorce de [month], veintiuno de [month], setenta y siete de [month]." You'd need to specify the month for each.

* If they are a code or sequence: You would simply say the numbers: "siete, catorce, veintiuno, setenta y siete."

* As a list: "Siete, catorce, veintiuno, setenta y siete."

To provide the most accurate translation, please provide the context in which these numbers are used.