Most viewers first notice the egg yolks. There are several bright yellow yolks arranged around the pan, and each one clearly forms a circle. These are the easiest circles to count because they stand out against the white egg background.
Then there is the large circular shape of the fried egg itself. The egg white forms a big ring around the center of the pan. The pan is also round, adding another large circle to the image. These obvious shapes are what many people count first.