Complex sentence: The federal districts ("federalnyye okruga ") are president's groupings of federal subjects of Russia for the convenience of operation and governing by a"Plenipotentiary Representative of the President of the Russian Federation in a Federal District".
Split into simpler sentences: The federal districts ("federalnyye okruga ") are groupings of the federal subjects of Russia. Each district includes several federal subjects and each federal district has a presidential envoy titled a"Plenipotentiary Representative of the President of the Russian Federation in a Federal District".