#include<iostream> #include<cstdio> #include<cstring> #include<cmath> #include<bits/stdc++.h> using namespace std; int main(){ /*int a,b,c; cin>>a>>b; c=a*10+b; a=c*c; cout<<a;*/ int a,b,c,d; cin>>a>>b>>c>>d; cout<<(c*10+d)/(a*10+b); return 0; }