libzarith-ocaml-dev 1.7-1 (s390x binary) in ubuntu eoan

 The Zarith library implements arithmetic and logical operations over
 arbitrary-precision integers. It uses GMP to efficiently implement
 arithmetic over big integers. Small integers are represented as Caml
 unboxed integers, for speed and space economy.
 .
 This package provides the static library, OCaml library and interface
 for developing applications to use libzarith-ocaml.