Install this version:
emerge -a =dev-perl/Math-NumberCruncher-5.0.0
If this version is masked, you can unmask it using the autounmask tool or standard emerge options:
autounmask =dev-perl/Math-NumberCruncher-5.0.0
Or alternatively:
emerge --autounmask-write -a =dev-perl/Math-NumberCruncher-5.0.0
# Copyright 1999-2021 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2
EAPI=8
DIST_VERSION=5.00
DIST_AUTHOR=SIFUKURT
inherit perl-module
DESCRIPTION="Collection of useful math-related functions"
SLOT="0"
KEYWORDS="~amd64 ~x86"
RDEPEND="
>=virtual/perl-Math-BigInt-1.470.0
"
BDEPEND="${RDEPEND}
virtual/perl-ExtUtils-MakeMaker
"
>=virtual/perl-Math-BigInt-1.470.0
>=virtual/perl-Math-BigInt-1.470.0 virtual/perl-ExtUtils-MakeMaker