Mali is 110 times larger than Gambia.
Area: 11,295 km2 World Factbook
Population: 1,925,527 (July 2014) World Factbook
The Gambia is a country in West Africa. It is surrounded by Senegal, apart from a short strip of Atlantic coastline at its western end. It is the smallest country on mainland Africa. Wikipedia
Area: 1,240,192 km2 World Factbook
Population: 16,455,903 (July 2014) World Factbook
Mali, officially the Republic of Mali, is a landlocked country in West Africa. Mali is bordered by Algeria to the north, Niger to the east, Burkina Faso and Ivory Coast to the south, Guinea to the south-west, and Senegal and Mauritania to the west. Wikipedia