I also found the description confusing. Try watching this video, if you watch just half of it, it should be much clearer what is done already.

I though i should get the value of n and the multiply for each fraction given until the result number is not an integer, but it looks like i am wrong

That's actually correct (although it's important to note that you need to return the last integer number you calculated, but I think that's clear from the tests.). What I suspect that might be your mistake is not returning to the beginning of the array, once you did a multiplication. This was the issue in my case at least.