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.
10/(200 10^6 9.5 10^15) = 1.22 ( 5.5 10^(-7)) / x)
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random