#include <stdio.h>;


void getFun(int *p, int n) {
    for(int i = 0; i < n; i++) {
        scanf("%d", &p[i]);
    }
}

int gcd(int a,int b) {
    int r;
    while(b>0) {
        r=a%b;
        a=b;
        b=r;
    }
    return a;
}

int main() {
    int t, n;
    
    scanf("%d", &t);
    while(t--) {
        int f[1024] = {0}, g[1024] = {0};
        scanf("%d", &n);
        getFun(f, n);
        getFun(g, n);
        int af = n- 1, ag = n - 1;
        for(; f[af] == 0; af--);
        for(; g[ag] == 0; ag--);
        if(af > ag) printf("1/0\n");
        else if(af < ag) printf("0/1\n");
        else {
            int tm = gcd(f[af], g[ag]);
            printf("%d/%d\n", f[af]/tm,g[ag]/tm);
        }
        }
    return 0;
}