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
using System;

namespace AOJ0054
{
    class Program
    {
        static void Main(string[] args)
        {
            while (true)
            {
                string input = Console.ReadLine();
                if (string.IsNullOrEmpty(input)) break;

                string[] num = input.Split(' ');

                float a = float.Parse(num[0]);
                int b = int.Parse(num[1]);
                int N = int.Parse(num[2]);
                //Calculation
                decimal d = (decimal) a / b;
                d -= (int) a / b;

                //Get Length
                string dstr = d.ToString();
                dstr = dstr.Substring(2);

                int sum = 0;

                for (int i = 0; i < N; i++)
                {
                    if (i >= dstr.Length) break;

                    sum += int.Parse(dstr.Substring(i, 1));
                }

                Console.WriteLine(sum);
            }
        }
    }
}