1 import java.io.BufferedReader; 2 import java.io.IOException; 3 import java.io.InputStreamReader; 4  5 public class Main { 6  7     public static void main(String[] args) throws IOException { 8          9         BufferedReader reader=new BufferedReader(new InputStreamReader(System.in));10         11         boolean first=true;12         while(first || reader.ready()){13             first=false;14             String expression=reader.readLine();15             String ans=solve(expression);16             System.out.println(ans);17         }18         19     }20     21     public static String solve(String expressions){22         int a=expressions.charAt(0)-‘0‘;23         int b=expressions.charAt(2)-‘0‘;24         int c=expressions.charAt(4)-‘0‘;25         int d=expressions.charAt(6)-‘0‘;26     27         char o=expressions.charAt(3);28         29         if(b==0 || d==0) return "0";30         31         int e=(o==‘-‘)?(a*d-b*c):(a*d+b*c);32         int f=b*d;33         34         if(e==0) return "0";35         if(e==f) return "1";36         if(f==1) return Integer.toString(e);37         38         int t=gcd(Math.abs(e),Math.abs(f));39         if(t==f) return Integer.toString(e/t);40         return String.format("%d/%d",e/t,f/t);41     }42     43     public static int gcd(int a,int b){44         return b==0?a:gcd(b,a%b);45     }46     47 }