Trying to figure a phrase I've been hearing: ななじゅっと


Recently I've been hearing people around me use a phrase that sounds like
"ななじゅっと" especially in the morning when talking about the days plans. I can't
seem to find anything on a dictionary - just leads to an entry for seventy
which I am pretty sure is not what they are saying is.

Any help?




I've figured out that they are referring to the building number that we are
in, which is 70. So they are saying something like 七十棟｛ななじゅっとう} to mean
building 70

