Read this: The Cafe Procope was established in Paris in 1686; by the 1720s there were around 400 cafes in the city. The Cafe Procope in particular became a center of Enlightenment, welcoming such celebrities as Voltaire and Rousseau. The Cafe Procope was where Diderot and D'Alembert decided to create the Encyclopedie. The cafes were one of the various "nerve centers" for bruits publics, public noise or rumour. These bruits were allegedly a much better source of information than were the actual newspapers available at the time.

By the 1720s. how many cafes were in Paris?
What is the answer? (If it cannot be answered, return "unanswerable")
around 400