MATH SYMBOLS
'(<a href="http://www.j-archive.com/media/2010-11-18_DJ_14.jpg" target="_blank">Sarah of the Clue Crew explains an equation on the monitor.</a>)  In math, an exclamation mark is called a factorial symbol; it means to do this with every positive integer of equal or lesser value--in this case, equal to 120'
multiply it