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
#include <stdio.h>

int main(void){
	int a, b;
	int n;
	int ans;

	while(scanf("%d %d %d", &a, &b, &n) != EOF){
		ans = 0;

		int d = a % b;
		d *= 10;
		for(int i=0; i<n; i++){
			ans += d / b;
			d = d % b;
			d *= 10;
		}
		printf("%d\n", ans);
	}

	return 0;
}