#include<bits/stdc++.h>

using namespace std;

long long n,m;
long long a,b;
long long ans,bns;

long long gcd(long long x,long long y)
{
	if(y==0)
	{
		return x;
	}
	return gcd(y,x%y);
}

long long lcm(long long x,long long y)
{
	return x*y/gcd(x,bns);
}

void so()
{
	long long a=1,b=0;
	long long l=max(ans,bns);
	for(long long i=1; i<=l; i++)
	{
		for(long long j=1; j<=l; j++)
		{
			if((double)i/j>=(double)ans/bns&&(double)i/j<(double)a/b)
			{
				a=i;
				b=j;
			}
		}
	}
	ans=a;
	bns=b;
}

int main()
{
	freopen("fenshu.in","r",stdin);
	freopen("fenshu.out","w",stdout);
	cin>>n>>m;
	cin>>a>>b;
	ans=a;
	bns=b;
	for(long long i=1; i<n; i++)
	{
		cin>>a>>b;
		if(b==bns)
		{
			ans+=a;
		}
		else
		{
			long long atmp=lcm(b,bns)/bns;
			long long btmp=lcm(b,bns)/b;
			bns*=atmp;
			ans*=atmp;
			b*=btmp;
			a*=btmp;
			ans+=a;
		}
		so();
	}
	for(long long j=0; j<m; j++)
	{
		cin>>a;
		b=1;
		ans*=b;
		bns*=a;
		so();
	}
	if(ans==bns)
	{
		cout<<ans;
	}
	else
	{
		cout<<ans<<" "<<bns;
	}

	return 0;
}