Thats about right though I think it’s actually simpler than that. You have 180 days on a visa plus 90 visa free so in total 270 days. If you enter and exit through France I can’t see you having any problem within 270 days. (Actually based on my experience, unless he could see it on the system, I don’t think he was going to make any reference to us overstaying the 90. He really didn’t seem bothered. I know everyone obsesses about it but I really think they have bigger fish to fry than overstaying moho tourists)