jmc

Recall that $$1\text{mbox}foot=12\text{mbox}inches$$

Hence $$1\text{mbox}{foot}^2=12^2\text{mbox}{inches}^2=144\text{mbox}{inches}^2$$

Finally, remember the formula $V=l\times w\times h$, that is, Volume is the product of length, width, and height.

The length, height, and width for a cube are equal, so the cube we are given has sides of length $1\text{mbox}feet$. Now, a cube has 6 faces, so the surface area of our cube is $$6\times (1\text{mbox}foot\times 1\text{mbox}foot)=6\text{mbox}{feet}^2$$

Now, convert: $$6\text{mbox}{feet}^2\frac{144\text{mbox}{inches}^2}{1\text{mbox}{foot}^2}=864\text{mbox}{inches}^2$$

So, our final answer is $\boxed{864\text{mbox}{inches}^2}$