I need help finding out the number of times I need to run a furnace based on the number of items that need to go in it. The max number of items per run is 6 so if there's 6 it's 1 run. If there's 7 it will be two runs. 9 is still two runs but 13 is 3 runs and so on up to infinity. I can't for the life of me figure out how to do that and I can't figure out the right terms to search for to find it online.