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.
(4* 6.67 * 10^-11 * 2* 10^30)/ ((3*10^8)^2 * 7* 10^8) radian
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random