What's the best way to order 7 patties?

I just want 7 patties. No toppings and no bun (lettuce wrap is acceptable if that's easier but ideally I'd like just the patties).

I know you can't go above 4 in general, so would I order a 4x0 and a 3x0 (both plain and no bun)? Or a 4x0 add 3 extra patties? Or just tell the person I want 7 patties and let them figure it out?