#include<stdio.h>
#include<stdlib.h>
#include<string.h>
#include<ctype.h>
#include<math.h>
int main(){
	int  a,b,n;
	scanf("%d%d%d",&a,&b,&n);
	printf("%d%s",a/b,".");
	while(n!=0){
		a = a%b*10;
		printf("%d",a/b);
		n--;
	}
	return 0;
}

/**************************************************************
	Problem: 1271
	User: admin
	Language: C
	Result: Accepted
	Time:11 ms
	Memory:1144 kb
****************************************************************/