What is 111111111times 111111111?

Answer 1

111111111 x 111111111 = 12'345.6789876, "Hope that helps."

you can get the square of any number which contain only 1, like: 11 or 11111111 with the thrick below, & of course there would be no need for any kinda calculator.

11*11=121

111*111=12321

1111*1111=1234321

got it ? just count how many times 1 has been repeated in the number, for instance in the last case it's been repeated 4 times. then simply write 1 2 3 4 3 2 1.

this cutoff has no limitation in frequency of 1 in the number.

& Done.

Answer 2

12345678987654321