As per the problem , we are given that
The window is 823 ft wide and 534 ft high.
The formula for the area of a rectangle is [tex] A=bh. [/tex]
So from the given information in the problem we can write
[tex] b=823 ft\\\\h=534 ft\\ [/tex]
Now substitute these values in the given formula we get
[tex] A=823ft*534ft\\\\A=439482 ft^2\\ [/tex]
Area of the window=[tex] 439482 ft^2 [/tex]