text: Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
  ### Context:
  CREATE TABLE table_name_7 (gdp__ppp__$m_usd VARCHAR, population_density__per_km²_ VARCHAR)
  ### Question:
  How much is the GDP for a population density of 254.7?
  ### Answer:
  SELECT gdp__ppp__$m_usd FROM table_name_7 WHERE population_density__per_km²_ = "254.7"