That's the amount Saudi Arabia has spent so far building mosques around the world and promoting their hard line version of Islam. They follow the version called Wahhabism which is one of the stricter interpretations of their holy writings. And this from a Country who will allow NO other forms of religious worship. They won't even allow non muslims to visit their two holiest cities Mecca and Medina.
http://www.straitstimes.com/opinion/creating-frankenstein-the-saudi-export-of-wahhabism
As nosebleed likes to say "You couldn't make it up".
Non-Muslims who pray with others in Saudi Arabia engage in an illicit activity that could get them busted, as though they had participated in a drug party.
the Saudis fund mosque after mosque. In the kingdom, though, only mosques are allowed; it hosts not a single church – or, for that matter, synagogue, or Hindu, Sikh, Jain, or Baha'i temple. Hints going back nearly a decade that the Saudis will allow a church have not born fruit but seem to serve as delaying tactics.
http://www.danielpipes.org/16874/no-saudi-money-for-american-mosquesThe Saudis have been arrogantly indiscreet about spending to promote Wahhabism. For example, a 2005 Freedom House report reviewed some of the extremist literature provided to the public by Saudi-funded institutions and concluded that it poses "a grave threat to non-Muslims and to the Muslim community itself."
http://www.straitstimes.com/opinion/creating-frankenstein-the-saudi-export-of-wahhabism
As nosebleed likes to say "You couldn't make it up".