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.
7
k
=
3
7
!
k
!
7
-
k
!
×
1
4
k
×
3
4
7
-
k
Math Input
Natural Language
Math Input