#include <stdio.h>
using namespace std;
int n;
int a[1200] , b[1200];
int g (int x,int y){
    int t;
    if ( x < y ) {
        t = x;
        x = y;
        y = t;
    }
    while ( y ) {
        t = x % y;
        x = y;
        y = t;
    }
    return x;
}
int main () {
    int t;
    scanf ( "%d" , &t );
    while ( t-- ) {
        int i;
        scanf ( "%d" , &n );
        for ( i = 1 ; i <= n ; i++ ) {
            scanf ( "%d" , &a[i] );
        }
        for ( i = 1 ; i <= n ; i++ ) {
            scanf ( "%d" , &b[i] );
        }
        while ( a[n] == 0 && b[n] == 0 ) n--;
        if ( a[n] == 0 ) b[n] = 1;
        if ( b[n] == 0 ) a[n] = 1;
        printf ( "%d/%d\n" , a[n] / g ( a[n] , b[n] ) , b[n] / g(a[n],b[n] ) );
    }
    return 0;
}