CREATE TABLE table_name_4 (heat VARCHAR2, mark VARCHAR2, react VARCHAR2)

What is the heat number at 7.63, and a reaction less than 0.229?
SELECT COUNT(heat) FROM table_name_4 WHERE mark = "7.63" AND react < 0.229
SELECT COUNT("heat") FROM "table_name_4" WHERE "7.63" = "mark" AND "react" < 0.229