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[]){
		new Main().mainrun();
	}

	private Scanner scan;

	private void mainrun() {
		scan = new Scanner(System.in);

		while(scan.hasNext()){
			int a = scan.nextInt();
			int b = scan.nextInt();
			int n = scan.nextInt();
			
			looprun(a,b,n);
		}
	}
	
	private void looprun(int a,int b,int n) {
		int Ans = 0;
		int num = (a % b) * 10;
		for(int i = 0;i < n;i++) {
			Ans += num / b;
			
			num = (num % b) * 10;
		}
		
		System.out.println(Ans);
	}
}
