#include<bits/stdc++.h>
using namespace std;
int main()
{
	int n,a,s,d,f,g,h,minn=999999999;
	cin>>n>>a>>s>>d>>f>>g>>h;
	if(int(n/a)*s<minn)minn = (int(n/a)*s);
	if(int(n/d)*f<minn)minn = (int(n/a)*s);
	if(int(n/g)*h<minn)minn = (int(n/a)*s);
	cout<<minn;
}