Radio Shack TRS-80 PC-3 Owner's Manual page 30

Type in a 5 to replace the 6. One caution in replacing characters - one you type a new character over an existing character, the
original is gone forever! You cannot recall an expression that has been typed over.
Input
300/5-
60.
Sixty seems Iike a reasonable number of groups, so you decide that each small group will consist of five participants.
Recall is also useful to verify your last entry, especially when you results do not seem to make sense. For instance, suppose you
had performed this calculation:
6.
Even a tired, overworked manager like you realizes that 6 does not seem to be a reasonable result when you are dealing with hund-
reds of people! Recall your entry using the
~
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