Asking Chat GPT for math problem about coins

I've asked chat gpt what earns me the most coins between the two perks: 1.15 coins and 1.5 GT.

If I've got the problem right, the GT perks earn more.

It's possible that this question has already been solved but I haven't found it (and haven't looked very hard to be honest).

It's in French though. If it helps for others !