Legislative constituencies are used in Russia to elect half of the seats (225) in the State Duma.
[3] These "Lepestkovy" drawing usually involves major cities and/or regional capitals being split up between multiple constituencies.
This is done to split up urban voters (who tend to be more liberal) and pair them up with a bigger rural population.
The number of constituencies a Federal Subject is entitled to is determined using the Hare Quota.
By dividing the total number of voters in Russia (109,902,583) by 225 (the total amount of Deputies, elected through single-mandate constituencies), you get 488,455.924, the desired average number of voters in a constituency, also known as the "Government Norm" (GN).