Greece is about 119 times bigger than Hong Kong.

Hong Kong is approximately 1,108 sq km, while Greece is approximately 131,957 sq km, making Greece 11,809% larger than Hong Kong. Meanwhile, the population of Hong Kong is ~7.3 million people (3.3 million more people live in Greece).
Tip: This to-scale comparison of Hong Kong vs. Greece uses the Mercator projection, which distorts the size of regions near the poles.