find replace

i have values such as 646444515863 & 646444104178
I need to keep the 6 digits after "64644"
so 646444515863 would change to 451586

thanks in advance

Use
=MID(A1,6,10)
MID will select letter No 6 to 10.
You might also want to set 11 of more (255) instead of 10. It will also work.

Ola Sandström