Abacre.com

I have 10 digit long serial no & I have tried to increment by 1. Like 2009083001 this no should increment to 2009083002.

Here's i am searching for (\d{10}) & I am trying to replace with <=%$1+1%=>.

I got this in output 2009083001.99999968 .

Can you please anyone let me know why this is not ...