[42] pry(main)> a
=> Wed, 18 Dec 2013 16:18:00 +0000
[43] pry(main)> b
=> Fri, 21 Dec 2103 06:26:00 +0000
[44] pry(main)> b - a
=> (2958623/90)
[45] pry(main)> (b - a).to_i
=> 32873