I just got a cheap bell computer for 10 bucks and it has all the features that I need. One thing that I can't figure out is how to set up a proper wheel size. I have 700x32 tires and there are 4 digits that should somehow correspond to my wheel size.

Here is the quote from the manual:

"the wheel value the distance in millimeters per one revolution of wheel"

table:

Road bike
20" 1586
22" 1759
24" 1916
26" 2073
27/700c 2124

I am guessing the last one represents the closest to my tire and the last 2 digits go to 29 and then it resets at 20. The third digit resets after 9 as well as second and the first one resets after 4.

It might be straight forward but I am not really getting it.The manual doesn't really cut it for me. I have ridden at 2129 and it seems somewhat accurate but I just don't know what those numbers represent. If anyone could point me in the right direction, I'd buy an imaginary best beer ever or maybe a couple. thanks