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.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class Main{
	public static void main(String[] args) throws IOException {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		String str,strArray[];
		int a,b,n,temp;

		while((str=br.readLine()) != null){
			int sum=0,r=1;
			strArray = str.split(" ");
			a = Integer.parseInt(strArray[0]);
			b = Integer.parseInt(strArray[1]);
			n = Integer.parseInt(strArray[2]);
		    sum=0;
			temp=a%b;

			for(int i=0; i<n; i++){
				sum += temp*10/b;
				temp = temp*10%b;
			}
			System.out.println(sum);
		}
	}
}