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

class Main {
    public static void main(String[] args) throws IOException {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        String line;

        while ((line = br.readLine()) != null) {
            String[] input = line.split(" ");
            int s = 0;
            int a = Integer.parseInt(input[0]);
            int b = Integer.parseInt(input[1]);
            int n = Integer.parseInt(input[2]);

            int q = a;
            q -= (q / b) * b;

            for (int i = 0; i < n; i++) {
                s += (q * 10) / b;
                q = (q * 10) % b;
                if (q == 0)
                    break;
            }

            System.out.println(s);
        }
    }
}
