CREATE TABLE table_19805130_3 (rating VARCHAR2)

If the rating/share is 3.8/10, what is the total number of rating?
SELECT COUNT(rating) FROM table_19805130_3 WHERE rating / SHARE(18 - 49) = 3.8 / 10
SELECT COUNT("rating") FROM "table_19805130_3" WHERE "rating" / NULLIF(SHARE(-31), 0) = 3.8 / NULLIF(10, 0)