Steren CAL-150 Instructivo De Uso página 177

Ans memory can be used in the same way as other memo-
ries thus making it possible to use this function with other
programs.
In multiplication formulas, the immediately before Ans
can be omitted.
Example:
Continuous Operation Function
Even after an operation has been completed by pressing
the button, you can use the result of this operation for
another operation.
Example:
In order to calculate the answer +12, simply press: +12