Robuta

https://github.com/lcn2/calc
C-style arbitrary precision calculator. Contribute to lcn2/calc development by creating an account on GitHub.
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https://www.nist.gov/publications/fortran-program-arbitrary-precision-arithmetic
arbitrary precisionfortranprogramarithmeticnist
https://github.com/cockroachdb/apd
Arbitrary-precision decimals for Go. Contribute to cockroachdb/apd development by creating an account on GitHub.
arbitrary precisiongithubcockroachdbapddecimals