Calculate the area of a rectangle with a width of 4 cm and a length of 10 cm.

To determine the area of a rectangle, the formula to use is:

Area = Length × Width.

In this scenario, the length is 10 cm and the width is 4 cm. Plugging these values into the formula gives:

Area = 10 cm × 4 cm = 40 cm².

Thus, the area of the rectangle is 40 cm². This confirms that the answer is accurate, as the calculation follows the basic principles of geometry concerning the area of rectangles.