Assume that a, b, and n are all positive integers. Let f (i) be the i-th fraction of the fraction a / b (0 ≤ f (i) ≤ 9). At this time, let s be the sum of f (i) from i = 1 to n.

s = f (1) + f (2) + ... + f (n)


Create a program that reads a, b, n, outputs s, and exits.



Input

The input consists of multiple datasets. For each dataset, three integers a (1 ≤ a ≤ 1000), b (1 ≤ b ≤ 10000), n (1 ≤ n ≤ 100) are given on one line, separated by blanks.

The number of datasets does not exceed 100.

Output

Prints s on one line for each dataset.

Example

Input

1 2 3
2 3 4
5 4 3
4 3 2


Output

5
24
7
6

import java.awt.geom.Point2D;
import java.util.*;
 
public class Main {
    Scanner sc = new Scanner(System.in);
 
    public static void main(String[] args) {
    	new Main(); 
    }
 
    public Main() {
    	while(sc.hasNext()){
    		new aoj0054().doIt();
    	}
    }
    class aoj0054{
    	void doIt(){
    		int a = sc.nextInt();
    		int b = sc.nextInt();
    		if(a >= b)a = a % b;
    		int n = sc.nextInt();
    		int sum = 0;
    		for(int i = 0;i < n;i++){
    			a = a * 10;
    			sum += a / b;
    			a = a % b;
    		}
    		System.out.println(sum);
    	}
    }
}