These are the packages that would be merged, in order:

Calculating dependencies ... done!
Dependency resolution took 0.97 s (backtrack: 0/20).

[ebuild  N     ] dev-perl/Math-Int64-0.540.0-r1::gentoo  USE="-examples -test" PERL_FEATURES="ithreads (-debug) -quadmath" 117 KiB
[ebuild  N     ] dev-perl/Math-Int128-0.220.0-r1::gentoo  USE="-examples -test" PERL_FEATURES="ithreads (-debug) -quadmath" 102 KiB

Total: 2 packages (2 new), Size of downloads: 219 KiB