How (if at all) does DNA employ math that is not a part of it's own chemistry?

I will be referring to DNA as a person since people are just DNA anyway.

How for example do bodies stop growing? Or how does an embryo know where to place limbs? And then there’s the thousands of obvious circles (yes the shape) in life on any scale.

Are all these circles just evolutionary necessities? Or does DNA know pi?

Mostly curious if DNA knows pi.