Excel is a horrible tool, in general. I remember that I exported a very long list of numbers to a .CSV. Excel then formatted the numbers (like 53564566934 to th

Excel is a horrible tool, in general. I remember that I exported a very long list of numbers to a .CSV. Excel then formatted the numbers (like 53564566934 to the form 52564E+6). If you then copy and paste, the numbers are actually converted to 52564000000. Result: I had to do a lot of work again. Which is partly my fault, and partly a horrific design.