You will have 4 pieces.
Explanation
Suppose, the number of pieces is [tex]x[/tex]
As each piece must be [tex]\frac{1}{8}[/tex] of a square and you have initially [tex]\frac{1}{2}[/tex] of a square, so the equation will be.....
[tex]\frac{1}{8}x= \frac{1}{2}\\ \\ x= \frac{1}{2}*8 = 4[/tex]
So, you will have 4 pieces.
