300
It doesn't mention a number. The book of Matthew, the only gospel to mention the wise men / Magi / kings, doesn’t say how many there were. It just says that they visited the baby Jesus and offered him gifts of gold, frankincense, and myrrh. People just assume that there were three wise men because there were three gifts. But really the author could have been talking about two or seven or fifty wise men / Magi / kings.
How many wise men / Magi / kings does the bible say visited the baby Jesus?