HP 39g+ - Manual (Page 171)

Variables and memory management 12-3
5. Enter a name for the variable.
A
6. Press to store the result.
The results of a calculation can also be stored directly to
a variable. For example:
2 5 3
B
To recall a value To recall a variable’s value, type the name of the variable
and press
.
A
To use variables in
calculations You can use variables in calculations. The calculator
substitutes the variable’s value in the calculation:
65 A