I would first check to see what's in your area, don't just consider the larger ones like McDonalds but maybe smaller independent places which might offer better value.
For example, some days I might have 3 triple cheeseburgers and large fries from McDonalds, another day a large take out pizza from the Pizza Hut down the road and another time a doner kebab with cheese fries from the independant.
Also check out any food delivery services in your area, I got a bunch of take out food a while ago because of some offers from Amazon/Deliveroo.
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