CREATE TABLE table_28741_1 (area__km_2__ INT, capital VARCHAR)

How few km 2 does the area with Nay Pyi Taw as capital cover?
SELECT MIN(area__km_2__) FROM table_28741_1 WHERE capital = "Nay Pyi Taw"
SELECT MIN("area__km_2__") FROM "table_28741_1" WHERE "Nay Pyi Taw" = "capital"