This is a false statement! Alaska is less than 100km away from Russia...
Where the 'main parts' are and on what continents they are doesn't contradict the fact that they are actually pretty close. I wouldn't say Turkey is far from Greece because Ankara is on the Asian continent and pretty far from Athens either.
Yes indeed, you should check the distance between countries by calculating from
The main part of Russia , Moscow etc is near Europe and America is on the other side of the world.
That argument suggests Russia is more than 200 km from any other country, even though it shares borders with about a dozen.
That is incorect because They're on different continents.
So Indonesia is also far from itself then, because it's on two continents