#include<bits/stdc++.h> using namespace std; int main(){ double n,x,x1,y,y1,z,z1; cin>>n>>x>>x1>>y>>y1>>z>>z1; x = ceil(n/x); y = ceil(n/y); z = ceil(n/z); int ans1 = x*x1; int ans2 = y*y1; int ans3 = z*z1; int minn = 99999; if(ans1 < minn){ minn = ans1; } if(ans2 < minn){ minn = ans2; } if(ans3 < minn){ minn = ans3; } cout<<minn; return 0; }