In 2012 Facebook had 1BN users and 180K servers.
1,000,000 users / 180,000 servers = 5,556 users per server
In 2017 Facebook has close to 2BN users.
2,000,000 users / 5556 users per server = 360,000 servers
Notice how the 1B has only 6 zeros. The awesome part is that this mistake evens itself out later, yielding a correct number for "The of servers".
Notice how the 1B has only 6 zeros. The awesome part is that this mistake evens itself out later, yielding a correct number for "The of servers".