7. As shown in the figure below, fold an A4 paper along the midpoints of its two longer sides, and you will get 2 smaller rectangles. The ratio of the length to width of the smaller rectangles is the same as that of the A4 paper. If the length of the A4 paper is 29.7 cm, then the area of the square with the width of the A4 paper as its side length is
square centimeters (accurate to one decimal place).
$441.0$