Convert from exameter to hair's breadth

Unit Definition (exameter)
An exametre (American spelling: exameter, symbol: Em) is a unit of length equal to 1018 metres.

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).