25x25x25x25x25x25x25x25x25x25x25x25x25x8x8x8x8x8x8x8x8x8x8x8x8x8x8x8x8x8x8x8x8x8x8x9x9x9x9x9x9x9x9x9x9x9x9x9x9x9x9x9x9x9x9x9x9x9x9x9x99x9xx9x9x9x9x9999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999990999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999=?