For a pure numeric answer, click on the 'Options' tab and select 'real numbers'.  The decimal answer 0.0025 can be expressed as 2.5*10^(-3).  Some of that manipulation is better suited for Algebrator:

To help you clearly understand our desktop software and how appropriate it may be for your needs, please use one of the following links to obtain a free trial of the program:

Windows: http://www.softmath.com/tr/alg51win-tr-en.exe

Mac: http://www.softmath.com/tr/alg51mac-tr-en.dmg