4 ms·
I also spent hours messing around with calculators as a kid. I recall noticing that: 11 * 11 = 121 111 * 111 = 12321 1111 * 1111 = 1234321 and so on, where
by danielbarla 11mo ago
I also spent hours messing around with calculators as a kid. I recall noticing that:
11 * 11 = 121
111 * 111 = 12321
1111 * 1111 = 1234321
and so on, where the largest digit in the answer is the number of digits in the multiplicands.