Jacksonville, Florida is 23 times larger than Fort Lauderdale, Florida.
Area: 88 km2 calculated
Fort Lauderdale is a city in the U.S. state of Florida, on the Atlantic coast 23 miles north of Miami. It is the county seat of Broward County. As of the 2010 census, the city had a population of 165,521. Wikipedia
Area: 1,988 km2 calculated
Jacksonville is the largest city in the U.S. state of Florida by population and the largest city by area in the contiguous United States. It is the county seat of Duval County, with which the city government consolidated in 1968. Wikipedia