CREATE TABLE table_71640 ("Year" FLOAT, "Team" CLOB, "Co-Drivers" CLOB, "Class" CLOB, "Laps" FLOAT, "Pos." CLOB, "Class Pos." CLOB)

What was the class when there were 325 laps?
SELECT "Class" FROM table_71640 WHERE "Laps" = '325'
SELECT "Class" FROM "table_71640" WHERE "Laps" = '325'