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.
(2 * pi) / ((((1 - (π / ((((4 * π)^2) / (10^7))^2))) * 2 * π) * 6.674297466e-11) - 1)
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random