I want to know the answer to the following question:
How many Euros was Greece able to "hide" because of an arrangement with Goldman Sachs?
All the background I'm provided with is that "An error sometimes made is the confusion of discussion regarding Greece’s Eurozone entry with the controversy regarding usage of derivatives’ deals with U.S. Banks by Greece and other Eurozone countries to artificially reduce their reported budget deficits.". Is that enough to answer the question?