That answer was incorrect.
Rom was incorrect? Sorry about that. This will be better.
I also got the same answer as the people on that website, but it was also incorrect.
Hm... I got the same answer as them too.... lemme try again.
We can pair them up in 5*4*7 which is 140 ways. (They are distinguishable, remember?)
140 is also wrong, but thanks for trying.