Domain: culture (Cultural Knowledge and History)
Problem: I need to analyze the demographic impact on the geography of the coastal nations shown here. Please filter these countries for those with a 2023 population exceeding 20 million and a GDP per capita below 3000 USD. For the qualifying country with the longest physical coastline, calculate the product of its 2023 population density and its total coastline length in kilometers, providing the result as a rounded integer.
Answer: Any number within 47164-48675 is considered correct