On National Pi Day, March 14, Bojangles’ guests can enjoy three of the Southern chain’s Sweet Potato Pies for the price of $3.14.

The Bojangles’ Sweet Potato Pie is a crisp, oven-baked pastry, with a decadent sweet potato puree filling. Baked to a golden-brown, each pie is then brushed with a delectable cinnamon butter before serving. Despite their rectangle shape, these treats are the perfect way to celebrate a day that’s all about circles.

“Combining math and dessert has never been so much fun,” says Chef Marshall Scarborough, Bojangles’ vice president of menu and culinary innovation. “But seriously, three of our indulgent Sweet Potato Pies plus one great price equals a tasty treat for our customers to enjoy!”

Bite into this special while it’s hot, because it only runs on March 14. Pricing and participation may vary by location.