The width of a rectangle is M centimeters, and its length is 5 times its width. What's the area of the rectangle?

Let's call the width of the rectangle "M".

According to the problem, the length of the rectangle is 5 times its width. So,

Length = 5M

To find the area of the rectangle, we need to multiply the length by the width:

Area = Length x Width

Substituting in the values we have:

Area = 5M x M

Area = 5M^2

So, the area of the rectangle is 5M^2 square centimeters.