CREATE TABLE table_50650 ("Official Name" TEXT, "Status" TEXT, "Area km 2" FLOAT, "Population" FLOAT, "Census Ranking" TEXT)

What is the sum of the areas for populations of 542?
SELECT SUM("Area km 2") FROM table_50650 WHERE "Population" = '542'
SELECT SUM("Area km 2") FROM "table_50650" WHERE "Population" = '542'