#include<bits/stdc++.h>
using namespace std;
long long int n,m ,a,b,x=0,y=0,c;
int ys(long long int a,long long int b)
{
	for(long long int j=2;j<=min(a,b);j++)
	{
		while(a%j==0&&b%j==0)
		{
			a/=j;
			b/=j;
		}
	}
	x=a;
	y=b;
}
int main()
{
	freopen("fenshu.in","r",stdin);
	freopen("fenshu.out","w",stdout);
	cin>>n>>m;
	cin>>x>>y;
	ys(x,y);
	for(int i=2;i<=n;i++)
	{
	cin>>a>>b;
	if(b==y)x+=a;
	else
	{
		x=x*b+a*y;
		y*=b;
		 
	}
	ys(x,y);
    }
    for(int i=1;i<=m;i++)
    {
    	cin>>c;
    	y*=c;
    	ys(x,y);
	}
	if(x==1)cout<<x;
	else cout<<x<<" "<<y;
	return 0; 
 }