CREATE TABLE table_204_816 (id DECIMAL, "locomotive" TEXT, "named" TEXT, "serial no" TEXT, "entered service" TEXT, "gauge" TEXT, "livery" TEXT)

how many locomotives are not standard gauge ?
SELECT COUNT("locomotive") FROM table_204_816 WHERE "gauge" <> 'standard'
SELECT COUNT("locomotive") FROM "table_204_816" WHERE "gauge" <> 'standard'