Height×width=8580/33=260in2.
There are many answers for individual heights (h) and widths (w) because hw=260 so h=260/w.
For example, if w=20in, then h=13in (and vice versa). You could also have w=10in, so h=26in.
And there are many answers involving fractions of an inch, for example, w=16in, h=16¼in.