the town of Kstovo is 22 km southeast of a city that is the capital of which federal district ?
Nizhny Novgorod Nizhny Novgorod (Russian: Ни́жний Но́вгород ; ] ), colloquially shortened to Nizhny, is a city in the administrative center (capital) of Volga Federal District and Nizhny Novgorod Oblast in Russia. From 1932 to 1990, it was known as Gorky (Горький , ] ), after the writer Maxim Gorky, who was born there. The city is an important economic, transportation, scientific, educational and cultural center in Russia and the vast Volga-Vyatka economic region, and is the main center of river tourism in Russia. In the historic part of the city there is a large number of universities, theaters, museums and churches. Nizhny Novgorod is located about 400 km east of Moscow, where the Oka empties into the Volga. Population:  (2010 Census) ;  (2002 Census) ;  (1989 Census)
Petrogradsky District Petrogradsky District (Russian: Петрогра́дский райо́н ) is a district of the federal city of St. Petersburg, Russia. It borders the Bolshaya Nevka River in the north and in the east, the Neva River in the south, and areas around the Malaya Neva River in the west. District's population:  (2010 Census) ;  (2002 Census)