Here's my problem, I have an excel file with a column of 12 digit numbers. I need to save this file as a comma separated text file with the formatted normally (not in scientific notation).

My usual process is to save it as a .csv then change the extension to .txt but excel automatically puts the numbers into scientific notation as soon as I save it as a .csv 453139201.3949E+11, etc. and in the process I lose the last couple digits of the number.

In short I need to take a normal .xls file with 12 digit numbers and turn it into a comma separated txt file that is not in scientific notation.