Fort Lauderdale is about 1,600 times smaller than Illinois.

Illinois is approximately 143,961 sq km, while Fort Lauderdale (excluding the city's 9.9 sq km of water area) is approximately 90 sq km, making Fort Lauderdale 0.06% the size of Illinois.
Tip: This to-scale comparison of Illinois vs. Fort Lauderdale uses the Mercator projection, which distorts the size of regions near the poles.