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.*;

import java.lang.*;

import java.math.*;



public class Main {

	Scanner sc = new Scanner(System.in);

	void run(){

		for(;sc.hasNextInt();){

			int a = sc.nextInt();

			int b = sc.nextInt();

			int n = sc.nextInt();

			a = a%b;

			int sum=0;

			for(int i=0;i<n;i++){

				sum+=a*10/b;

				a = a*10%b;

			}

			System.out.println(sum);

		}

		

	}

	public static void main(String[] args){

		Main m = new Main();

		m.run();

		

	}

}