This article is from the Puzzles FAQ, by Chris Cole email@example.com and Matthew Daly firstname.lastname@example.org with numerous contributions by others.
Make 383 out of 1,2,25,50,75,100 using +,-,*,/.
You can get 383 with ((2+50)/25+1)*100+75.
Of course, if you expect / as in C, the above expression is just 375.
But then you can get 383 with (25*50-100)/(1+2). Pity there's no way
to use the 75.
If we had a language that rounded instead of truncating, we could use
((1+75+100)*50)/(25-2) or (2*75*(25+100))/(50-1).
I imagine your problem lies in not dividing things that aren't