CREATE TABLE table_56370 ("Year" FLOAT, "Entrant" CLOB, "Chassis" CLOB, "Engine" CLOB, "Pts." FLOAT)

waht is the last year with a mclaren mp4/10b chassis
SELECT MAX("Year") FROM table_56370 WHERE "Chassis" = 'mclaren mp4/10b'
SELECT MAX("Year") FROM "table_56370" WHERE "Chassis" = 'mclaren mp4/10b'