#include <stdio.h>
struct frac_t
{
    int numerator; /*分子*/
    int denominator; /*分母*/
};
struct frac_t div(struct frac_t,struct frac_t);
void print(struct frac_t);
int gcd(int,int); /*最大公約数を求める*/
int main(void)
{
    struct frac_t f1,f2,f3;
    scanf("%d/%d",&f1.numerator,&f1.denominator);
    scanf("%d/%d",&f2.numerator,&f2.denominator);
    f3=div(f1,f2);
    print(f3);
    printf("\n");
    return 0;
}
struct frac_t div(struct frac_t f1,struct frac_t f2)
{
    struct frac_t fm;
    int div;
    fm.numerator=f1.numerator/f2.numerator;
    fm.denominator=f1.denominator/f2.denominator;
    div=gcd(fm.numerator,fm.denominator);
    fm.numerator /=div;
    fm.denominator /=div;
    return fm;
}    
void print(struct frac_t f)
{
    if(f.numerator > 0){
       if(f.denominator > 0){
          printf("%d/%d",f.numerator,f.denominator);
       }else{
          printf("-%d/%d",f.numerator,-f.denominator);
       }
    }else if(f.numerator < 0){
       if(f.denominator > 0){
          printf("-%d/%d",-f.numerator,-f.denominator);
       }else{
          printf("%d/%d",-f.numerator,-f.denominator);
       }
    }else{
          printf("0");
    }
}
int gcd(int m,int n)
{   
    int r;
    do{
      r = m % n;
      m = n;
      n = r;
    }while(r!=0);
    return m;
}