To find the area of a rectangle, we use the formula:

$\text{Area} = \text{length} \times \text{width}$

In this case:

• Length $= 15 \, \text{cm}$
• Width $= 40 \, \text{cm}$

So, $\text{Area} = 15 \times 40 = 600 \, \text{cm}^2$

The area of the rectangle is 600 cm².

Would you like a breakdown of each calculation step or any further clarification?

Here are some related questions you might find helpful:

1. What is the perimeter of this rectangle?
2. How do you find the area of other shapes like triangles or circles?
3. How does changing one dimension affect the area of a rectangle?
4. What are the units of area, and why is it expressed in square units?
5. Can this area calculation be applied to other objects, like the surface area of a box?

Tip: Remember to always include units in your final answer for clarity.