CREATE TABLE table_203_152 (id DECIMAL, "province" TEXT, "capital" TEXT, "area  ( km2 ) " DECIMAL, "population" DECIMAL, "density" DECIMAL)

what is the difference between the area of san cristobal and puerto plata ?
SELECT ABS((SELECT "area (km2)" FROM table_203_152 WHERE "province" = 'san cristobal') - (SELECT "area (km2)" FROM table_203_152 WHERE "province" = 'puerto plata'))
SELECT ABS((SELECT "area (km2)" FROM "table_203_152" WHERE "province" = 'san cristobal') - (SELECT "area (km2)" FROM "table_203_152" WHERE "province" = 'puerto plata'))