#include<bits/stdc++.h> 
using namespace std; 
int main(){ 
    double n,x,y;
    cin>>n>>x>>y;
    cout<<(int)((n * 1000 + y * 10) / (x * 10 + y * 10));
} 
/**************************************************************
	Problem: 1331
	User: linzihang
	Language: C++
	Result: Accepted
	Time:10 ms
	Memory:2072 kb
****************************************************************/