Simplify the following text for a Grade 11 native English-speaking person.
Original: Preparing to rebuild the international economic system as World War II was still raging , 730 delegates from all 44 Allied nations gathered at the Mount Washington Hotel in Bretton Woods , New Hampshire , United States , for the United Nations Monetary and Financial Conference .
Simplified: 730 delegates from all 44 Allies of World War II came to Bretton Woods , New Hampshire for the United Nations Monetary and Financial Conference .