To find the area of a rectangle, you can use the expression:
\[ \text{Area} = \text{length} \times \text{width} \]
In Natalia's case, the length is 57 inches and the width is 41 inches. Therefore, the expression she can use to find the area of the rug is:
\[ \text{Area} = 57 , \text{inches} \times 41 , \text{inches} \]
This will give her the area in square inches.