Revision 4d5be7c4-45b4-44c7-827b-31d911c68214 - Stack Overflow

##Java, <strike>200</strike> <strike>192</strike> 179 characters

I think everyone knows that Java would not have the shortest implementation, but I wanted to see how it would compare. It solves the trivial examples, but not the bonus one.

Here is the minimized version:

 class F{public static void main(String[]a){long p=new Long(a[0]);for(int i=1;i<a.length;){long n=p*new Long(a[i++]),d=new Long(a[i++]);if(n%d<1){p=n/d;i=1;}}System.out.print(p);}}

java -cp . F 108 455 33 11 13 1 11 3 7 11 2 1 3

 15625

java -cp . F 1296 3 2

 6561

Here is the cleaned-up version:

 public class Fractran {

 public static void main(String[] args) {
 long product = new Long(args[0]);

 for (int index = 1; index < args.length;) {
 long numerator = product * new Long(args[index++]);
 long denominator = new Long(args[index++]);

 if (numerator % denominator < 1) {
 product = numerator / denominator;
 index = 1;
 } // if
 } // for

 System.out.print(product);
 }
 }