(6.67 * 10^(-11)) * (0.2550 * 5.98 * 10^24) / ((3.209 * 10^6) ^ 2)

Uh oh! Wolfram|Alpha doesn't run without JavaScript.

Please enable JavaScript. If you don't know how, you can find instructionshere.Once you've done that, refresh this page to start using Wolfram|Alpha.