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.
([299792 km/s]*[2.997x10^7])*(2,2x10^-6 s)
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random