The question, as stated, cannot be answered sensibly. A square foot is a measure of area, with dimensions [L2]. A cubic foor is a measure of volume, with dimensions [L3]. The two measure different things and elementary dimensional analysis teaches that you cannot convert between measures with different dimensions such as these without additional information.
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There are no square feet in any cubic feet. Those two units are used for
completely different things, and they don't convert to each other.
"Square feet" tells you how much carpet you'd need to cover the floor of a room.
"Cubic feet" tells you how much water you'd need to fill the room, floor to ceiling.