# Square of Reversal of Small-Digit Number

## Theorem

Let $n$ be an integer whose decimal representation consists of sufficiently small digits.

Then the reversal of the square of $n$ is the square of the reversal of $n$.

## Examples

### Square of Reversal of $12$

$12^2 = 144$
$21^2 = 441$

### Square of Reversal of $13$

$13^2 = 169$
$31^2 = 961$