fx-82MS fx-82TL fx-9860GII TI-83
INS
On a Casio calculator you can insert a digit or function at the current cursor position
DEL
and the insert cursor ░ will then be displayed. By pressing again or with = you come back to the normal cursor.
Example 1
To change 13 × 456 in 123 × 456 by inserting the digit 2 in the location you want
<< DEL 1░×456 2 = 123×456 5,928. 56,088.