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.
(300*20")*(50*20")*(30*20")*.2/(15 * 365 cubic feet per year)
(300*20")*(50*20")*(30*20")*.2/(15 * 365 cubic feet per year)
Natural Language
Math Input
Extended Keyboard
