Multiplying columns of numbers

Hi,

Sorry if this seems rather a basic question but I am a bit of a newbie. Basically I have columns of numbers eg.

123
23
34
56
6
621
etc.....

and say I want to muliply them all by, say, 2 so I'd get a column of numbers which would read

246
46
68
112
12
1242
etc.....

How exactly do I perform this kind of mass-multiplication? Presumably with a function of some kind? I've played around with them but can't seem to find one which does it.

Thanks!

Electra
x

Thanks so much, you're my hero!

Electra
x