Do it several times, each time picking the same number. You'll see that the symbols will change around. It turns out that there are a limited number of choices that you'll ever get, and those are 9 and its multiples. So, look at 9, 18, 27 etc., and you'll notice that the symbols are all the same, all the time. So, the results are fixed. Entertaining though.
7 billion, one nation, imagination...it's a beautiful day