It's because we were able to run, during the manufacturing process, 20 colors for the X and the O, which is the name of the computer, and by mixing them on the manufacturing floor, you get 20 times 20: you get 400 different options there.
To je zato jer smo bili u mogućnosti isprobavati, tijekom procesa proizvodnje, dvadeset boja za X i za O, što je ime računala, i miješajući ih u pogonima za proizvodnju, dobijete dvadeset puta dvadeset: dobijete 400 različitih opcija.