10cm culture dish has a surface area of 56.7 cm^2. If you seed 2.2 x 10^6 cells, at confluency you may obtain 8.8 x 10^6 cells. This is an approximate number. It will give you an idea about the cell number in a 10cm dish at confluency for NSC-34 cells.
I have attached a link below which provides information about number of cells at confluency for various sizes of cell culture dishes and flasks using HeLa cells. This number will vary with cell type.
The capacity of a 10 cm dish can vary depending on the specific cell type and their growth characteristics. However, as an estimation, a confluent monolayer of cells in a 10 cm dish typically contains approximately 1-2 million cells.
Please note that this estimation can vary and is dependent on various factors such as the seeding density, growth conditions, and doubling time of the specific cell line being used