#include<bits/stdc++.h>
using namespace std;
using Int = long long;
template<typename T1,typename T2> inline void chmin(T1 &a,T2 b){if(a>b) a=b;}
template<typename T1,typename T2> inline void chmax(T1 &a,T2 b){if(a<b) a=b;}


struct frac{
  Int num,dom;
  frac(){}
  frac(Int num,Int dom):num(num),dom(dom){}
  frac norm(){
    if(num==0) return frac(0,1);
    Int tmp=__gcd(num,dom);
    return frac(num/tmp,dom/tmp);
  }
  frac operator+(frac a){return frac(num*a.dom+a.num*dom,dom*a.dom).norm();}
  frac operator-(frac a){return frac(num*a.dom-a.num*dom,dom*a.dom).norm();}
  frac operator*(frac a){return frac(num*a.num,dom*a.dom).norm();}
  frac operator/(frac a){return frac(num*a.dom,dom*a.num).norm();}
  frac operator*(Int k){return frac(num*k,dom).norm();}
  frac operator/(Int k){return frac(num,dom*k).norm();}
  bool operator<(const frac a)const{
    return num*a.dom<a.num*dom;
  }
  bool operator>(const frac a)const{
    return num*a.dom>a.num*dom;
  }
  bool operator==(const frac a)const{
    return num*a.dom==a.num*dom;
  }
  bool operator!=(const frac a)const{
    return num*a.dom!=a.num*dom;
  }
  bool operator<=(const frac a)const{
    return num*a.dom<=a.num*dom;
  }
  bool operator>=(const frac a)const{
    return num*a.dom>=a.num*dom;
  }
};

//INSERT ABOVE HERE
signed main(){
  Int n;
  cin>>n;
  vector<Int> a(n);
  for(Int i=0;i<n;i++) cin>>a[i];
  Int m;
  cin>>m;
  vector<Int> b(m);
  for(Int i=0;i<m;i++) cin>>b[i];

  Int s=0;
  for(Int i=0;i<n;i++) s+=a[i]<0;
  for(Int i=0;i<m;i++) s+=b[i]<0;

  frac ans(abs(a[0]),1);
  for(Int i=1;i<n;i++) ans=ans/abs(a[i]);
  for(Int i=0;i<m;i++){
    if(i&1) ans=ans*abs(b[i]);
    else ans=ans/abs(b[i]);
  }

  ans=ans.norm();
  if(s&1) cout<<"-";
  cout<<ans.num<<" "<<ans.dom<<endl;
  return 0;
}