In this context, 6 would represent 60.
So, since this number is rising, as it goes up, the amount of numbers on it also rises, depending on how many numbers there truly are. Even though there are the 2 numbers after the decimal, the value 6 represents will not change unless the number behind it rises over 9, of which it's value would become greater.
Hope this helps, and I'll be honest at first I was kind of struggling to give an explanation.
-Sayonara
