Convert from didot point to hair's breadth

Unit Definition (didot point)
The didot point is a unit of distance used in typography. It was named after the French typographer Firmin Didot (1764-1836).

Unit Definition (hair's breadth)
The hair's breadth is a common informal unit of distance. Human hairs vary considerably in width, depending on age, color, genetics, and other factors. An average hair is approximately 70 to 100 micrometers (µm) in diameter, so, as a rough standard, a hair's breadth is 100 µm or 0.1 millimeter (mm).