Square of Small-Digit Palindromic Number is Palindromic/Examples/11,111

Example of Square of Small-Digit Palindromic Number is Palindromic

 * $11 \, 111^2 = 123 \, 454 \, 321$

Proof
11111 x  11111 -   11111   111110  1111100 11111000 111110000 - 123454321