CREATE TABLE table_16928 ("Governorate" TEXT, "Name in Russian" TEXT, "Name in Polish" TEXT, "Seat" TEXT, "Area ,  in thousands of km 2" FLOAT, "Population ,  in thousands ,  (  1905  ) " FLOAT)

governs an area with what area (in thousand km 2)?
SELECT "Area, in thousands of km 2" FROM table_16928 WHERE "Name in Russian" = 'Плоцкая губерния'
SELECT "Area, in thousands of km 2" FROM "table_16928" WHERE "Name in Russian" = 'Плоцкая губерния'