What is main st burger king?

As an AI language model, I don't have access to the latest and specific information about a certain restaurant franchise or its branches. However, here's some general information about Burger King, which could help you:

Burger King is an American fast-food chain that was founded in 1953. It's widely known for serving flame-grilled burgers, chicken sandwiches, French fries, and other food items around the world. As of 2021, Burger King has more than 18,000 outlets in 100 countries, making it one of the largest fast-food chains globally.

Main St Burger King might be a particular Burger King branch located on Main Street in a particular town or city, and it should offer the same menu and services as the other Burger King locations, but again, I don't have any specific details without additional context.