What place in the town of New Castle is on 0.45 sqmi of land on the east bank of the Hudson River and also in the state where First Star Software, Inc. is based?
First Star Software: First Star Software, Inc. Chappaqua, New York: Chappaqua is a hamlet and census-designated place in the town of New Castle, in northern Westchester County, New York. Chappaqua, New York:  It is on 0.45 sqmi of land on the east bank of the Hudson River, about 30 mi north of New York City.
i don't know