Cost of living in Chittagong (Bangladesh) is about the same as in Allahabad (India)
WARNING! This comparison is based on only a few data points. At this point it is only a guess. It is based on 95 prices entered by 21 different people.
For example, you would need at least ₨67,319 (Taka 83,194) in Chittagong to maintain the same standard of living that you can have with ₨66,000 in Allahabad.