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 {
	private Scanner sc;
	
	public static void main(String[] args) {
		new Main();
	}
	
	public Main() {
		sc = new Scanner(System.in);
		
		while (sc.hasNextLine()) {
			String line = sc.nextLine();
			
			String[] nico = line.split(" ");

			int a = Integer.parseInt(nico[0]);
			int b = Integer.parseInt(nico[1]);
			int n = Integer.parseInt(nico[2]);
			
			String s = String.valueOf((double)(a % b) / b);
			
			int ans = 0;
			for (int i = 2; i < s.length(); i++) {
				ans = ans + s.charAt(i) - '0';
				if (i == (n + 1)) break;
			}
			System.out.println(ans);
		}
	}
}