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.util.Scanner;

public class Main{
    public static void main(String[] args){
        Scanner scan = new Scanner(System.in);
        while(scan.hasNext()){
        	int a = scan.nextInt();
        	int b = scan.nextInt();
        	int n = scan.nextInt();
        	double c = (double)a / (double)b;
        	String str = String.valueOf(c);
        	int tI = 0;
        	for(int i = 0;i < str.length();i++){
        		if(str.charAt(i) == '.'){
        			tI = i;
        			break;
        		}
        	}
        	int sum = 0;
        	for(int i = 0,j = tI + 1;i < n && j < str.length();i++,j++){
        		sum += Integer.parseInt(str.charAt(j)+"");
        	}
        	System.out.println(sum);
        }
    }
}