Texas Instruments Calculator User Manual page 15

For example, working in the Bond worksheet, you might want to round a
computed selling price to the nearest penny (two decimal places) before
continuing your calculation.
The calculator stores values to an accuracy of up to 13 digits. The
Note:
decimal format setting rounds the displayed value but not the
unrounded, internally stored value. (See "Choosing the Number of
Decimal Places Displayed" on page 4.)
Scientific Notation
;
When you compute a value in the standard-decimal format that is either
too large or small to be displayed, the calculator displays it in scientific
notation, that is, a base value (or mantissa), followed by a blank space,
followed by an exponent.
With AOS™ selected, you can press ; to enter a number in scientific
notation. (See "Choosing Calculation Methods" on page 5.)
For example, to enter 3 Q 10 < ;
, key in .
3 10 3
3
Overview of Calculator Operations 11