'Half' in the Bible

Then the king said, What is your desire, Queen Esther, and what is your request? I will give it to you, even to the half of my kingdom.

And while they were drinking wine the king said to Esther, What is your prayer? for it will be given to you and what is your request? for it will be done, even to the half of my kingdom.

And the king said to Esther again on the second day, while they were drinking, What is your prayer, Queen Esther? for it will be given to you; and what is your request? for it will be done, even to the half of my kingdom.