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.
福建棋牌网站（网址:QY81.COM）福建棋牌网站_福建棋牌网站_福建棋牌网站_8J8IUx8JU
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random
