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.
金沙9170入口（网址:QY81.COM）金沙9170入口_金沙9170入口_金沙9170入口_2BY2Q2Be2
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random
