What is the area of a rectangle with length 5 and width 3?

To find the area of a rectangle, you multiply the length by the width. In this case, the length of the rectangle is 5 units and the width is 3 units.

Calculating the area involves multiplying these two dimensions together:

Area = Length × Width

Area = 5 × 3

Area = 15 square units.

This calculation shows that the area of the rectangle is indeed 15. Understanding this process is crucial, as it applies to any rectangle, regardless of the specific measurements. The concept of area as the amount of space inside the shape is foundational in geometry, making this question a great example of applying a straightforward formula to solve real-world problems.