If hedgehogs bred division, and 1 time a day, shared
Today – 1 hedgehog
Tomorrow – 2 hedgehogs
The day after tomorrow – 4 hedgehogs
In 3 days – 8 hedgehogs
In 4 days – 16 hedgehogs
In 5 days – 32 hedgehogs
In 6 days – 64 hedgehogs
In a week – 128 hedgehogs
In 8 days – 256 hedgehogs
In 9 days – 512 hedgehogs [...]