To find the area of the shaded rectangle, you need to multiply its length and width.

Since this is a unit square divided into smaller square tiles, you should first identify the dimensions of the shaded rectangle in terms of the smaller square tiles.

Let’s assume:

• The length of the shaded rectangle is equal to the number of tiles along the rectangle's longer side.
• The width of the shaded rectangle is equal to the number of tiles along its shorter side.

If you can provide the dimensions of the shaded rectangle (in terms of the number of smaller tiles), I will be able to fill in the equation for the area and calculate the result.

Would you like to share those details? Or do you want me to assist with another part of the problem?