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 static java.lang.Math.*;
import java.io.*;
public class Main{
	public static void main(String[] args) {
		Scanner sc=new Scanner(System.in);
		PrintWriter out = new PrintWriter(System.out);
		while(sc.hasNextInt()) {
			int a=sc.nextInt(),b=sc.nextInt(),n=sc.nextInt(),ans=0;
			double count=(double)a/b;
			count-=Math.floor(count);
			String d=String.valueOf(count);
			for(int i=2;i<n+2;i++) {
				if(i>=d.length())break;
				String temp=String.valueOf(d.charAt(i));
				ans+=Integer.parseInt(temp);
			}
			System.out.println(ans);
		}
	}
}