C++ :

#include <stdio.h>
#include <string.h>
#include <iostream>
#include <algorithm>
#include <vector>
#include <queue>
#include <set>
#include <map>
#include <string>
#include <math.h>
#include <stdlib.h>
#include <time.h>
using namespace std;

int main()
{
    //freopen("in.txt","r",stdin);
    //freopen("out.txt","w",stdout);
    float n, m;
    while(cin >> n >> m) {
        double sum = n / m;
        char str[1000];
        sprintf(str,"%.2f",sum);
        int len = strlen(str);
        if(str[len - 2] == '0' && str[len - 1] == '0')
            str[len - 3] = 0;
        else if(str[len - 1] == '0')
            str[len - 1] = 0;
        printf("%s\n",str);
    }
    return 0;
}