I have the following sentence to translate.
日本はカリフォルニア州と同じぐらいの大きさで
ほとんどのヨーロッパの国々より大きいということはあまり知られていない
I am having trouble translating the second half.
Japan is about the same size as the state of California and
as for it being bigger than most European countries, it is not (being) known very well.
Can anyone offer any hints about what the author is trying to say?