Give an example of a number that can be expressed as a rectangle as well as a square. Show the arrangement also.

The numbers that can be expressed as a rectangle as well as a square:

• Given non-negative integers m and n. m and $n$, not necessarily distinct,
• Rectangular numbers are numbers of the form$m\times n$. $m\times n$, more commonly written mn. and,

• Square numbers are of the form, $n\times n$

If $m = n$, then $mn = m^2 = n^2$. $mn = m^2 = n^2$, a square number.

For example $7^2 = 49$.

But if m not equal to n, then mn might be a rectangle. 

For example, $2 \times 18$