Sean has a square plot of land covered with grass. He places a sprinkler in the middle of the plot to water the grass. When the sprinkler is running, it sprays water over a circular region with a radius of 8 feet. The total area of grass Sean's plot that will not get water is approximately _____ square feet. (Use π = 3.14)
a) 64
b) 128
c) 200.96
d) 256