March 14 is Pi Day! And that means lots of delicious baked goods for the mathematically inclined. The day gets its name from three, one and four, the first three digits of the mathematical constant known as pi. Among other things, pi is the ratio of the circumference of a circle to its diameter. Any way you slice it, pi is kind of a big deal. And as people around the world hunker down for extended periods indoors, we may see renewed interest in baking.