Numeric data are always calculated in up to 15 significant decimal digits; you can, however, choose to display the data in up to 6 or 15 significant decimal digits.
When entering numeric data, values greater than 106 or less than 10-6 are displayed in exponential notation. The letter e is used to indicate exponential notation; however, on input, the letter E is also recognized. For example, you can enter 6,000,000 in the following ways: 6e6 or 6E6.