Zakhar is 7 years old, and his brother Procopius is 9. Each of the brothers already has his own deer and his own tundra for nomadic life. Previously, children born in a nomadic family at this age were almost forcibly taken away to study at a boarding school on the mainland. And they rarely returned to their parents' house. Trying to preserve the traditions of the nomadic peoples in the Krasnoyarsk Territory, the authorities decided to revive the practice of "nomadic schools" that disappeared in Russia in the 1930s. This is how 23-year-old Nelly Andreevna ends up in the Zharkov family in order to explain to Zakhar and Prokopiy why mathematics is needed in life and who Vladimir Putin is.
Short version.