District class represents information about a district in Bangladesh,
including its name in English and Bangla, the division it belongs to,
the total number of upazilas (sub-districts), total villages, and its area.
Division class represents information about a division in Bangladesh,
including its name in English and Bangla, ISO code, year of establishment,
total number of districts, total number of upazilas (sub-districts),
total number of union councils, area, population, and population density.
Upazila class represents information about an upazila (sub-district) in Bangladesh,
including its name in English and Bangla, the division it belongs to, and the district it belongs to.
