"For two people."
Translation:Para dos personas.
Por means by, so por favor is please... also known por (by) favor (favor)... i see it as asking a favor to be done... para means for, para mi (for me), para tú (for you) para escuela (for school)... hope that helps
I was about to ask when one would use persona/personas versus genre/gentes and vice versa when I noticed your comment.
"Para" vs "por" is tough since they both can be translated as "for" (as well as many other English prepositions). I still mess it up, but these articles helped me to improve:
FULL DISCLOSURE: Native English speaker - US, Southern Appalachian dialect. Other uses of English may vary. Advice about Spanish should be taken with a grain of salt.