If 8 applicants join 1 group then 6 classrooms for 1 floor. There are 3 floors.
8*6*3=144 applicants for 1 time slot
If 1 time slot is 30 mins, then start from 8:30 to 12:30. There are 8 time slots.
2:00 to 6:00 there are another 8 time slots.
so 144*8*4=4608 is max otherwise school has to either open more classrooms or add one interview day.
Last year there were about 4000 applicants.