# how does one avoid calc's rounding a sum (result) to 2 decimal digits?

if I select a few cells containing data with up to 4 decimal digits, calc rounds the summation result to 2 decimal digits. this is so I can ascertain that a total is 1.0000 or 100%. when the sum is < or > than 1, I would like to know the margin of error; not the rounded to 2 decimal digit error.