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

Calculating dependencies ... done!
Dependency resolution took 1.02 s (backtrack: 0/20).

[ebuild  N     ] dev-libs/libowfat-0.34::gentoo  USE="-diet -verify-sig" 219 KiB
[ebuild  N     ] acct-group/gatling-0-r3::gentoo  0 KiB
[ebuild  N     ] acct-user/gatling-0-r3::gentoo  0 KiB
[ebuild  N     ] www-servers/gatling-0.16-r6::gentoo  USE="ssl -diet" 124 KiB

Total: 4 packages (4 new), Size of downloads: 343 KiB