3 1/4 x 3 1/4 x 3 1/4
This is what I got:
\(3\frac14*3\frac14*3\frac14=\frac{13}{4}*\frac{13}{4}*\frac{13}{4}=\frac{2197}{64}\)
the answer is 507/64 (the slash is a fraction bar)