And you can birth one baby in 3 months by 3 women, right?

To add something useful as well besides snark, first of all, there are hard physical limits, which are sometimes well within context (you really shouldn’t try to outcompete light speed for example, relevant in some high-freq trading, infrastructure projects). Then you can try to increase headcount to any number, you won’t produce for example a better compiler. There are simply jobs that are more “serial” - the only way to win at those is to try to employ the very best of the field in a small team.