Compound interest | Your Powerful Wealth Building Force!: Einstein thought that compound interest ought to be thought-about the eighth surprise of the world, however what's it? How does it work? atOptions = { 'key' : 'a8dfc29b76f8e0e43144f40c1f6e4e79', 'format' : 'iframe', 'height' : 90, 'width' : 728, 'params' : {} }; document.write('');