In the first chapter of Yechezkel, the Chayot are described ambiguously as having four wings. Is this per side, or a total number?
Targum on that passuk spells out the numbers and Rashi quotes him. Each chaya has 64 wings. They each have four partzuphim, each partzuph has four faces and each face has four wings. 4 X 4 x 4=64. Then, being that he saw 4 chayos turns out he saw 256 wings.