El Salvador is 82% larger than Qatar.
Area: 11,586 km2 World Factbook
Population: 2,123,160 (July 2014) World Factbook
Qatar, officially the State of Qatar, is a sovereign Arab country, located in Western Asia, occupying the small Qatar Peninsula on the northeasterly coast of the Arabian Peninsula. Its sole land border is with Saudi Arabia to the south, with the rest of its territory surrounded by the Persian Gulf. Wikipedia
Area: 21,041 km2 World Factbook
Population: 6,125,512 (July 2014) World Factbook
El Salvador, officially the Republic of El Salvador, is the smallest and the most densely populated country in Central America. The country's capital city and largest city is San Salvador. Important cultural and commercial centers for Central America on the whole include Santa Ana and San Miguel. Wikipedia