#include<stdio.h>
main(){
    int a,b,n,i,cor;
    while(scanf("%d %d %d",&a,&b,&n)!=EOF){
        printf("%d.",a/b); cor=a%b;
        for(i=0;i<n;i++){
            cor*=10;
            printf("%d",cor/b);
            cor%=b;
        }
        printf("\n");
    }
}