Returning the row  and column number  is easy.

There are several ways to "find" what you're looking for.
The best way depends on what it is you're trying to find.
Are you looking for a word  within a string?
a number within a string?
Or do you want to know all cells that are EQUAL to your designated string?
That is: If you're looking for "Jack", do you want ONLY cells that contain
"Jack", or do you want to include "Jacks", "Jackson", "Billy Jack", "Yukon
Jack",
"Cactus Jack", "Kojack" ??