Suppose the Home currency is the Real and trades at 1 Reals per Dollar. Home has external assets of $200 billion, all of which are denominated in dollars. It has external liabilities of $100 billion all of which are denominated in dollars. If the Real depreciates to 2 Reals per dollar, what is the change in Home's external wealth in Reals (in billions)? (report a negative number if it is decreasing, and a positive number if it increases)