None - you can't mix units like that!
How many more people are going to admit not knowing the basic differences between line, area and volume? This type of question is so common I wonder what is going wrong, and where.
I can understand individuals being baffled by the more abstruse, advanced topics - there are ones I cannot answer or would have to ask myself - but this form of question crops up so often that I wonder if a lot of schools fail to teach basic, everyday mensuration properly. Some questioners don't even know what information the respondent needs, so the question is not answerable.
At least it's not as bad as the sheer laziness of the "What's 49 divided by 7?" variety that take longer to type it than to calculate as simple mental or even calculator arithmetic!
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The formula for Cubic Feet is: Length × Width × Height. For example, a 600 square foot room with a 10 foot ceiling would be 6000 cubic feet.
If you multiply feet x feet x feet, you get cubic feet, not square feet.
1100 cubic feet
6 It depends how deep you want it.
Something with measurements in three different dimensions would give you a volume in cubed feet not an area in square feet. 2' x 8' x 10' = 160 cubic feet.