Solve Area Problem $400 \mathrm{ft}$ By $320 \mathrm{ft}$ If a Square Patio with Sides

Multiple Choice

Solve area problem.
-A one-story building is $400 \mathrm{ft}$ by $320 \mathrm{ft}$ . If a square patio with sides $29 \mathrm{ft}$ occupies the center of the building, how much area remains for offices?

A) $127,159 \mathrm{ft}^{2}$
B) $1440 \mathrm{ft}^{2}$
C) $1324 \mathrm{ft}^{2}$
D) $1411 \mathrm{ft}^{2}$