A Post Script To The Mathematics Lesson....
I trust you do understand that the United States Of America will NEVER declare bankruptcy, i.e., default on our debt. What we will do is deflate it away. See Section Four of The Great Recession Conspiracy for details.
You do understand that Ben Bernake has printed THREE TRILLION DOLLARS in 100 dollar bills in the past few months. Most of it is tied up in the banking system for now, but when it starts getting distributed, remember this simple definition of INFLATION.
Too Many Dollars Chasing Too Few Goods And Services.