I counted the containers when it came into port, looked like it was stacked 7 high above deck for (2321+19)2*7 TEUs above deck, how much of the capacity is belo

I counted the containers when it came into port, looked like it was stacked 7 high above deck for (2321+19)2*7 TEUs above deck, how much of the capacity is below the deck line and how many containers can they stack above deck? 9?