The piece of wood is in a rectangular prism shape
And the volume formula for a rectangular prism is
V = length x width x height
The given are
Length = 1, Width = 1, Height = [tex] \frac{1}{3} [/tex]
Apply the formula (substitute the given)
V = 1 x 1 x[tex] \frac{1}{3} [/tex]
V of the piece of wood is: [tex] \frac{1}{3} [/tex] in³