Your requirements are unclear. I have no idea what you mean by a 'line of tablets with numbers' or where these might be found in your document. Without actually seeing the document, it can be difficult for anyone to provide an effective solution. Can you attach a document to a post with some representative data (delete anything sensitive)? You do this via the paperclip symbol on the 'Go Advanced' tab at the bottom of this screen.

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Cheers,
Paul Edstein
[Fmr MS MVP - Word]

Lets say i have 2x1 table in one i wrote
2 and in another 5, i want to select both tables and multiply by my selected number, lets say its number 2 so in the end result i expect table 1 to become 4 (from 2) and table 2 to become 10 (from 5).

P.s Sorry for bad English.