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#include <iostream> 
using namespace std; 

int main() { 
   int a, b, c, d; 
   cin >> a >> b >> c >> d; 
   int price = a * 10 + b; 
   int money = c * 10 + d; 
   int count = money / price; 
   cout << count << endl; 
   return 0; 
}