A decimal monetary type, as in COBOL

A fixed point number

An infinitely precise floating point number such as represented by the

`java.math.BigDecimal`

classAn IEEE754 double

A Java

`double`

An IEEE 754

`float`

A VAX Fortran

`REAL`

An imprecisely known decimal number with 4 significant digits that's plus or minus 1 in the last place.

An imprecisely known decimal number with 4 significant digits that's plus or minus 5 in the last place.

Build 67 of version 45 of Microsoft Word

A regular expression matching all strings that begin with the two characters '4' and '5', followed by a single character, followed by the two characters '6' and '7'.

A string of characters a monkey typed on a keyboard

Other interpretations are doubtless possible, and even make sense in particular contexts.
There's no guarantee that the string `45.67`

in fact represents any particular type.