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.
UPGRADE TO PRO
APPS
TOUR
Sign in
volume of rectangular prism with length 4ft, width 8in and height 20in in cubic inches
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random