Still, the Romans, like other civilizations, relied upon the Base 10 system for counting because of a biological accident. ... For example, 20 represents 24, 30 is 36, and 40 is 48.

Indeed, examples of base-12 systems abound. A carpenter’s ruler has 12 subdivisions, grocers deal in dozens and grosses (12 dozen equals a gross), pharmacists and jewelers use the 12 ounce pound ...

In base 8 world, this would be written out as about 66,000,000,000 or 66 "billion", that is, 66 times eight raised to the ninth power, just as a billion in our system is ten raised to the ninth power.