#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));

	return 0; 
} 
/**************************************************************
	Problem: 1331
	User: admin
	Language: C++
	Result: Accepted
	Time:8 ms
	Memory:2072 kb
****************************************************************/