(KGTV) - March 14 -- or 3.14 -- is Pi Day, and in celebration of this mathematical day, many restaurants and retailers are offering some great deals.
San Diego Chicken Pie Shop
2633 El Cajon Blvd., San Diego
-- The popular North Park restaurant has a great Pi Day deal: Get their famous chicken pie, gravy and a roll for just $3.14. The deal applies to dine-in or to-go orders.
Betty's Pie Whole Saloon
155 Quail Gardens Dr., Encinitas
-- Enjoy a lemon or key lime pie for $3.14, or you can get $3.14 off any 9-inch pie.
-- Throughout Pi Day, you can get a $3.14 pizza when you dine-in only. There are three locations in San Diego County to choose from: Encinitas (127 N. El Camino Real), San Diego (5604 Balboa Ave.) and Carlsbad (at the Premium Outlets, 5620 Paseo Del Norte)
-- Buy a full price adult entree and get a free slice of pie, with a special coupon (click here to get your coupon)! County locations: San Diego (6950 Alvarado Rd.), Chula Vista (330 F St.), Escondido (515 W. 13th Ave.)
Whole Foods Market
-- All Whole Foods locations are offering a $3.14 discount off large pies from their bakery. The deal is valid on Pi Day and only while supplies last.