CREATE TABLE table_203_510 (id DECIMAL, "township" TEXT, "fips" DECIMAL, "population\ center" TEXT, "population" DECIMAL, "population\ density\ ( /mi2 ) " DECIMAL, "population\ density\ ( /km2 ) " DECIMAL, "land area\ ( mi2 ) " DECIMAL, "land area\ ( km2 ) " DECIMAL, "water area\ ( mi2 ) " DECIMAL, "water area\ ( km2 ) " DECIMAL, "geographic coordinates" TEXT)

how much greater is the population of clark township than freeman township ?
SELECT (SELECT "population" FROM table_203_510 WHERE "township" = 'clark') - (SELECT "population" FROM table_203_510 WHERE "township" = 'freeman')
SELECT (SELECT "population" FROM "table_203_510" WHERE "township" = 'clark') - (SELECT "population" FROM "table_203_510" WHERE "township" = 'freeman')