#include<iostream> using namespace std; int main(){ /**long long w,d; cin>>w>>d; cout<<w+d; long long a,b; cin>>a>>b; cout<<(a*10+b)*(a*10+b); int a,b; cin>>a>>b; cout<<a*b; **/ int a,b,c,d; cin>>a>>b>>c>>d; cout<<(c*10+d)/(a*10+b); return 0; }