Hong Kong is about 257 times smaller than Nevada.

Nevada is approximately 284,448 sq km, while Hong Kong is approximately 1,108 sq km, making Hong Kong 0.39% the size of Nevada. Meanwhile, the population of Nevada is ~2.7 million people (4.6 million more people live in Hong Kong).
Tip: This to-scale comparison of Nevada vs. Hong Kong uses the Mercator projection, which distorts the size of regions near the poles.