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.InputStream;
import java.io.InputStreamReader;
import java.io.PrintStream;

class Main {

    public static void main(String[] args) throws IOException {
        doit(args, System.in, System.out);
    }

    static void doit(String[] args, InputStream in, PrintStream out)
            throws IOException {
        BufferedReader reader = new BufferedReader(new InputStreamReader(in));
        while (true) {
            String line = reader.readLine();
            if (line == null || line.isEmpty()) {
                break;
            }
            String[] values = line.split(" ");
            int a = Integer.parseInt(values[0]);
            int b = Integer.parseInt(values[1]);
            int n = Integer.parseInt(values[2]);
            int q = Math.abs(b);
            int p = Math.abs(a) % q;
            int sum = 0;
            for (int i = 0; i < n; i++) {
                p *= 10;
                int f = p / q;
                if (f == 0) {
                    continue;
                }
                sum += f;
                p %= q;
            }
            out.println(sum);
        }
    }
}