integer number to decimal

Hi all, I have a lot of integer numbers in columns "A" and I need to covert them to decimal, same as below as below :

column A ....... column B
..........................................
5644840 >>> 56.4484
5645035 >>> 56.45035
5645950 >>> 56.4595
5645509 >>> 56.45509
5646091 >>> 56.46091

I need column "b".

can someone help me?

Try:

=A1/100000