Casio fx-115ES User Manual page 41

Rounding Function (Rnd)
This function rounds the value or the result of the expression in the
function's argument to the number of significant digits specified by
the number of display digits setting.
Display Digits Setting: Norm1 or Norm2
The mantissa is rounded to 10 digits.
Display Digits Setting: Fix or Sci
The value is rounded to the specified number of digits.
Example: 200 ÷ 7 × 14 = 400
LINE
200/7*14=
(Specifies three decimal places.)
(Calculation is performed internally using 15 digits.)
The following performs the same calculation with rounding.
(Round the value to the specified number of digits.)
1N6(Fix)3
200/7=
*14=
200/7=
10(Rnd)=
E-39
FIX
FIX
FIX
FIX
FIX