Nope 64 is wrong answer. Try to think!! Try to use a little logic. Hint: It's all about logical reasoning.
We have total 204 Squares
if we observe clearly then we will find Horizontally or Vertically one 8 by 8 Squaes
if we observe clearly then we will find totally 204 Squares we count by merging the squares so we will get totally 204 Squares.