Assuming you're always dropping the first 2 digits:
="0"&RIGHT(A1,LEN(A1)-2)

If you're speciifcally looking for double 4's:
="0"&SUBSTITUTE(A1,"44","")

Do note that both of these result in a text string, not a number.

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Best Regards,

Luke M
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"Twoways" wrote:

I have in column A list of numbers looking like this 44345678912 and i need
to place a zero in front of the number but also taking away the two fours, i
know the formula for adding the zero ="0" & [A1] but can anyone help with
removing the two fours or a quick way to doing one at a time?