How to read the number of exhibition hall?

How to read the number of exhibition hall?

The English letter (A, B, or C) denotes one of the three major exhibition areas, and the Arabic number (1~16) after the letter but before the decimal point indicates one of the 16 exhibition halls in the three areas. Halls 1-8 are in Area A, Halls 9-13 in Area B, and Halls 14-16 in Area C. The numeral after the decimal point means the level of floor. So, A2.2 refers to the exhibition area on floor 2 of Hall 2 in Area A.