CREATE TABLE table_204_625 (id DECIMAL, "model" TEXT, "availability" TEXT, "introduced" TEXT, "length of use" TEXT, "last of whiteness" TEXT)

tell me the number of products that give you 12 months of whiteness .
SELECT COUNT("model") FROM table_204_625 WHERE "last of whiteness" = 12
SELECT COUNT("model") FROM "table_204_625" WHERE "last of whiteness" = 12