#include<iostream>// in out using namespace std; int main(){ /** int a;// cin>>a;// cout<<a;// int a,b;// cin>>a>>b; cout<<a+b; int x,y; cin>>x>>y; cout<<x*y; int a,b,c; cin>>a>>b>>c; cout<<a*b*c; int a,b,c; cin>>a; cin>>b; cin>>c; cout<<(a+b)/c; cout<<1000-(220*4); long long a,b; cin>>a>>b; cout<<a+b; 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; }