#include <stdio.h>
long long gcd(long long a,long long b){
if(a == 0)
return 0;
else
return (b == 0) ? a : gcd(b, a % b);
}
int main(){
int N;
long long lcp;
long long a,b,c,d;
int i = 1;
scanf("%d",&N);
scanf("%lld/%lld",&a,&b);
int t0 = gcd(a,b);
if(a){
a /= t0;
b /= t0;
}
while(i < N){
scanf("%lld/%lld",&c,&d);
lcp = b / gcd(b,d) * d;
a = a * lcp / b + c * lcp / d;
b = lcp;
int t0 = gcd(a,b);
if(t0 != 0){
a = a / t0;
b = b / t0;
}
i++;
}
if(a && a/b == 0)/// 整数部分为0 且 a不为 0
printf("%lld/%lld\n",a%b,b);
else if(a%b == 0)/// 小数部分为0
printf("%lld\n",a/b);
else
printf("%lld %lld/%lld\n",a/b,a%b,b);
return 0;
}