These numbers seem made up at times / difficult to comprehend what they expect is happening ...
It's a post-money valuation, so that suggests the money involved has transcended beyond actual moneyness into some other post-meaningful realm.
Post-money just means you add the value of the actual investment into the valuation. E.g. The pre-money valuation would be 183B - 13B. i.e. pre-money valuation would be 170B