Convert from twip to attometer

Unit Definition (twip)
A twip (which stands for Twentieth of a Point) is a typographical measurement. It is also used as the default measurement in Visual Basic. A twip is 1/1440 of an inch when derived from the PostScript point at 72 to the inch, as opposed to the printer's point at 72.27 to the inch.

Unit Definition (attometer)
An Attometer (or attometre) is equal to one quintillionth of a meter, or sometimes denoted as 10e-18 meters. The origin of the prefix is atten, the word for 18 in Danish and Norwegian.