The earth is divided into four quarters, just like a pizza/pie being divided into 4 one-forth slices (1/4 slice):

[7] And when the thousand years are expired, Satan shall be loosed out of his prison,
[8] and shall go out to deceive the nations which are in the four quarters of the earth, Gog and Magog, to gather them together to battle: the number of whom is as the sand of the sea.
Revelation 20:7-8 KJB
As per Revelation 20:7-8, there are nations in the four quarters of the earth.

[1] And after these things I saw four angels standing on the four corners of the earth, holding the four winds of the earth, that the wind should not blow on the earth, nor on the sea, nor on any tree.
Revelation 7:1 KJB

𝔅𝔦𝔟𝔩𝔦𝔠𝔞𝔩 𝔽𝔼