### Entering numeric data

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
10^{6} 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.

#### Arithmetic
operators

Most numeric data can be expressed using the arithmetic
operators + - * / and the usual rules of precedence. For example:

2 * (5 + 4) = 18

2 * 5 + 4 = 14

2 + 5 * 4 = 22