Question: What is the approximate area of this country where Lobelia columnaris can be found (other than Cameroon)?

Related documents: [0]  [DOC] Equatorial Guinea (Spanish: "Guinea Ecuatorial" , French: "Guinée équatoriale" , Portuguese: "Guiné Equatorial" ), officially the Republic of Equatorial Guinea (Spanish: "República de Guinea Ecuatorial" , French: "République de Guinée équatoriale" , Portuguese: "República da Guiné Equatorial" ), is a country located in Central Africa, with an area of 28000 km2 . Formerly the colony of Spanish Guinea, its post-independence name evokes its location near both the Equator and the Gulf of Guinea. Equatorial Guinea is the only sovereign African state in which Spanish is an official language. s of 2015 , the country had an estimated population of 1,222,245. [END] 
[1]  [DOC] Lobelia columnaris is a species of the Campanulaceae family. It is the only giant Lobelia occurring in West Africa and is found in Cameroon and Equatorial Guinea. Its natural habitat is subtropical or tropical dry forests. [END]  
Answer: 28000 km2
28000 km2