What does 2 Kings 18:14 mean?

Hezekiah, king of Judah, sent a message to the king of Assyria at Lachish, saying, I've done wrong. Please withdraw your army, and I'll pay whatever you demand. The king of Assyria demanded three hundred talents of silver and thirty talents of gold. 2 Kings 18:14 - Modern Text Bible

(Facing overwhelming force, Hezekiah tries to negotiate peace by admitting fault and offering a huge payment.)