Why do I get the impression that that took a while, and that perhaps you had better things to get on with?
Uncanny, Holmes!
I did it so no-one else has to. At first, it was relaxing, and even fun. But as the time wore on, and you complete more and more of it, the speed of the dividing slows down, and some don't work first time, so you have to be vigilant. Then you suddenly realise you can't close the page down, as it won't save your progress... and you'd have to start again... so you must go on, no matter how long it takes... and you dare not fail or you will be tormented, by others around you, but even more so by your inner soul... so when you think you've finished, you enlarge a screen grab and pore over it several times to find any larger circles you've missed, and mark the four that you find on the screen grab so you can find them on the page and destroy them, so that all is again well with the world...
This is an evil b@st@rd!