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.
欧亿博(网址:qmh8.com)欧亿博_欧亿博_欧亿博_欧亿博_欧亿博欧亿博_欧亿博_欧亿博_117pZppZk
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random