#include<bits/stdc++.h>
#define int __int128
using namespace std;
 
int p,q;
int n,m;
int ans_z,ans_m;
int gcd(int a,int b) { 
   	if(a<b){
   		swap(a,b);
   	}
   	if(a%b==0) return b;
   	else return gcd(b,a%b);
}
     
int gcd1(int a,int b){
   	return a*b/gcd(a,b);
}

inline int read() {
	int x=0; 
	char ch=getchar();
	while (ch>='0' && ch<='9')
	 {
		x=x*10+ch-48; 
		ch=getchar();
	}
	return x;
}

inline void print(int x) {
	if(x>9){
		print(x/10);
	}
	putchar(x%10+'0');
}

signed main(){
   	freopen("fenshu.in","r",stdin);
   	freopen("fenshu.out","w",stdout);
   	n=read();
   	m=read();
   	p=read();
   	q=read();
   	ans_z=p;
   	ans_m=q;
   	for(int i=2;i<=n;i++){
   		p=read();
 	  	q=read();
   		int k=gcd1(ans_m,q);
   		int k1=k/ans_m;
   		int k2=k/q;
   		ans_m=k;
   		ans_z=k1*ans_z+k2*p;
   		
   		int v=gcd(ans_m,ans_z);
   		ans_m/=v;
   		ans_z/=v;
   	}
   	for(int i=1;i<=m;i++){
   		p=read();
   		if(ans_z%p==0){
   			ans_z=ans_z/p;
   			continue;
   		}
   		ans_m*=p;
   	}
   	int v=gcd(ans_m,ans_z);
   	ans_m/=v;
   	ans_z/=v;
   	if(ans_m==1){
   		print(ans_z);
   		return 0;
   	}
   	print(ans_z);
   	printf(" ");
   	print(ans_m);
   	
   	return 0;
}