Try this:
=$A$1*A2
And then look up the difference between relative and absolute cell
references in the Help files.

Signature
HTH,
RD
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> if the formula is A1*A2 on the first row
> and for each other row i want B2, C2 etc to always be multiplied by A1 how
> can i do this. At the moment if i copy the formula from 1 row to the next
> it doesnt how the first as the constant. pls let me know the formula i
> need to use