CREATE TABLE table_3660 ("Series #" FLOAT, "Season #" FLOAT, "Title" TEXT, "Directed by" TEXT, "Written by" TEXT, "Original air date" TEXT, "Production code" TEXT)

When 3.89 is the production code how many season numbers are there?
SELECT COUNT("Season #") FROM table_3660 WHERE "Production code" = '3.89'
SELECT COUNT("Season #") FROM "table_3660" WHERE "Production code" = '3.89'