It's about 0.00000005 times the number of Chickens in the World.
In other words, 900 is 0.0000000470 times the count of Chickens in the World, and the count of Chickens in the World is 21,000,000 times that amount.(a.k.a. fowl) (Gallus gallus domesticus) (2011 figures) (average population)
The most numerous domesticated animals in the world, the estimated average population of chickens worldwide is 19 billion animals. Of these, about 6.4 billion birds produce the world's supply of chicken eggs.
It's about 0.000000003 times the number of Emails Sent per Day.
In other words, 900 is 0.000000003060 times the count of Emails Sent per Day, and the count of Emails Sent per Day is 327,000,000 times that amount.(2010 figures) (estimated averages)