从分成300个子字符串的长字符串中创建新的列?

I have a column containing 1200 character strings. In each one, every four character group is hexadecimal for a number. i.e. 300 numbers in hexadecimal crammed into a 1200 character string, in every row. I need to get each number out into decimal, and into its own column (300 new columns) named 1-300. Here's what I've figured out so far:I have a column containing 1200 character strin