Square root of five times the quantity ten minus four square root of two. 14 fifteen square root of two five square root of two end root minus four square root of ten ten square root of five end root minus four square root of ten

Koji is installing a rectangular window in an office building. the window is 823 feet wide and 534 feet high. the formula for the area of a rectangle is a=bh. what is the area of the window? enter your answer as a mixed number in simplest form in the box. $$ ft2