Trying to tie Google to one single grant doesn’t make sense, nor does associating the market cap of that company to that one grant make sense.

Google owes far more to TCP/IP research from DARPA than that particular library grant. But even then, the meta point is that you need lots of research pushing forward all edges of knowledge.

It is very rare that any single grant can result in a massive successful business at this point. Pushing computing forward needs constant research in all directions to push forward hardware, networks, security, power conservation/generation, algorithms, storage, etc, etc.