The above shows the trainer with 4/1 tack stalls which is four stalls as any number over one is the same value as the number. The trainer stalls is expressed as a fraction in case the trainer will participate in the split also for some reason. The split is automatically set to the most likely split. But in this case we have a show scratch that it so happens will not be participating in the tack stall split, so we will set our split to 4 / 9 (four stall divided amongst 9 entries) ...

And now we click the Apply button.

But now we have a non whole number for the trainer that is almost certainly incorrect and that we want to avoid, but it's because we need to remove our show scratch from the split...

Now we have our whole number of tack stalls and a correct split...