Uh oh! Wolfram|Alpha doesn't run without JavaScript.
Please enable JavaScript. If you don't know how, you can find instructions
here
.
Once you've done that, refresh this page to start using Wolfram|Alpha.
OVER 25 YEARS OF PROGRESS THROUGH DEDICATION COMPREHENSIVE CLIENTS 1949 15 1959 500 1669 3500 1975 10000
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random