[Help-bash] something about "find"

[lina]

Hi,

suppose under my ~/Documents has lots of files,

there are one file contains some sensitive numbers, like

7.9 2.4 4.2 12.2 and etc

How can I find this file out, also suppose I don't know the file name.

I tried

$ grep -e "7.9" -e "2.4" -e "4.2" -e "12.2" */*

...
lots of nonsense results out like
...
s100a9/s100a9.log:Package: natmove 2009/04/20 v1.1 Automatic citation 
moving with natbib
s100a9/s100a9.log:h-parts: 72.2698pt, 452.96826pt, 72.2698pt
s100a9/s100a9.log:\textwidth  452.96826pt


$ grep -e "7.9" -e "2.4" -e "4.2" -e "12.2" */*/*

I tried hard to read "man find", sorry, not hard enough, so still don't 
know how to proceed further,

Thanks with best regards,