#include<algorithm>

#include<cmath>

#include<cstdio>

#include<iostream>

#include<iomanip>

using namespace std;

int main(){

int a,b,n;

cin>>a>>b>>n;

//a=10? b=3? 0

for(int i=1;i<=n;i++){

a%=b;

a*=10;

}

a/=b;

cout<<a;

?

return 0;

}