What was the area (km²) (per sqmi) of a country with a population density per km² of 8.4/km² (/sqmi)?
create table table_26769_1 (area__km²___per_sqmi_ varchar, population_density_per_km² varchar, PRIMARY KEY (area__km²___per_sqmi_))
select area__km²___per_sqmi_ from table_26769_1 where population_density_per_km² = "8.4/km² (/sqmi)"