Steak n’ Shake restaurants have expanded their hours and hired more workers to accommodate a new “All-nighter” menu that includes a new “7X7” sandwich with seven hamburger patties and seven slices of American cheese.

Steak ‘n Shake operates eight Dayton-area restaurants as well as locations in the Hamilton, Middletown, Springfield and Fairfield areas.

The sandwich, called the “7X7,” is priced at $7.77. It contains 1,330 calories, 98 grams of fat, 45 grams of saturated fat and 4,490 milligrams of sodium, according to the “nutrition facts” page of Steak ‘n Shake’s own web site . The sandwich’s 98 grams of fat is about 150 percent of the Food and Drug Administration’s recommended intake of fat for an entire day.

The new mega-sandwich is part of the Indianapolis-based Steak ‘n Shake’s expansion into the overnight hours: it now offers its “All-Nighter” menu from midnight through 11 a.m. at participating locations, Steak ‘n Shake officials said in a news release. The menu also includes 99 cent breakfast tacos, $3.99 all-you-can-eat -pancakes and another new item, the “Steakburger Slinger,” a skillet of hash browns, chili, two burger patties, shredded cheese and two eggs for $5.99.

The expansion of restaurants’ hours resulted in additional hiring, but a Steak ‘n Shake spokeswoman contacted Friday said she did not have an estimate of how many new employees have been added.

The new menu “makes Steak ‘n Shake the ultimate all-night restaurant,” said Jim Flaniken, the restaurant chain’s senior vice president for marketing.

Founded in 1934, Steak ‘n Shake operates more than 500 restaurants across the country.