#include <iostream>
using namespace std;
int main()
{
int x,y,z,p,m,px,py,pz,pp,pm;
float prx,pry,prz,prp,prm,pt;
cin>>x>>y>>z>>p>>m>>px>>py>>pz>>pp>>pm;
//In caz ca vrei sa dai tu valori
//x=2;y=52;z=13;p=60;m=4;//1g/ml
//px=10;py=7;pz=73;pp=32;pm=12;//1kg/l
prx=(float)x/px;
pry=(float)y/py;
prz=(float)z/pz;
prp=(float)p/pp;
prm=(float)m/pm;
pt=prx+pry+prz+prp+prm;
cout<<pt;
return 0;
}
