The quick-service brand will pay homage to the mathematical holiday with a special deal: three Sweet Potato Pies for $3.14, available only on Thursday.

The five-unit fast-casual restaurant in Denver will celebrate Pi Day by giving away 3.14 10-inch pizzas to the first four people in line at 3:14 p.m. on Thursday. The first three guests will receive a free whole pizza and the fourth will get 0.14 of a pizza, though a footnote in the press release suggests that Mici might opt to also give the 0.14 recipients the remainder of their pie.

On Thursday, Pi Day fans can enjoy a Neapolitan Cheese Pizza for $3.14 at the quick-service chain, operated by Morristown, N.J.-based Villa Restaurant Group. To redeem the offer, patrons must download a coupon on the restaurant’s website. The deal is available at more than 200 participating locations.

For customers dining in or taking out, the casual-dining brand will offer a slice of key lime pie for $3.14 on Thursday. California Pizza Kitchen is based in Los Angeles and has more than 250 locations.

Babbo Italian Eatery, with eight units across the Phoenix metropolitan area, will serve its 8-inch cheese pizza for $5. The deal is redeemable for up to four pies per person, dine-in or take-out.

The fast-casual pizza brand will host its 11th annual Pi(e) Day event at participating locations across the U.S. on Thursday. The party will include a Your Pie Walk of Fame, games, giveaways, and pizzas for $3.14. Your Pie is based in Athens, Ga., with over 60 stores.

The fast-casual rotisserie chain will join the Pi Day fun with a buy-one-get-one deal on its Chicken Pot Pies for guests who bring a coupon from its website or show it on their phones. Boston Market is based in Golden, Colo., with more than 450 units.