have an 'A' number formatting option as adding machines do, so don't have to enter '.' all the time.
know excel was to be scientific, but bet it is used in 'financial' spreadsheets more than inventors could have envisioned.
'A' on adding machine, means 12 equals 12.00 saves 3 keys
12.1 12.10 saves 1 key
1210 12.10 saves 1 key
12.10 12.10 saves 0 keys
Sergei Baklan commented
If select File->Options->Advanced->Automatically insert a decimal point->Places:=2 when typing 1210 you'll have 12.10