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

Fort Lauderdale (excluding the city's 9.9 sq km of water area) is approximately 90 sq km, while Illinois is approximately 143,961 sq km, making Illinois 159,857% larger than Fort Lauderdale.
Tip: This to-scale comparison of Fort Lauderdale vs. Illinois uses the Mercator projection, which distorts the size of regions near the poles.