She can't work up the nerve to ask something that makes her look weirder than she already does. Let's see. Hm.
"This is a beautiful house you have here. Things aren't so spacious in the cities. How long ago was it built?"
The woman is somewhat surprised at this question, once she understands it, but she talks about how her grandson and his wife and their six children (six!) built it together so that her granddaughter and their family would have a place that was big enough for their growing family. Must have been about twelve years ago, now.
"Twelve... I'm no good at math, what year would that have been?"
3100 exactly. That's an easy one, Kairda should study her sums more, though of course the woman understands that not everyone has the opportunity to practice sums very often. Perhaps the green she's traveling with could help her with that.
Kairda laughs nervously, agrees, and relays to Zada that the year is 3112.