package com.company;
import java.util.*;
import java.math.*;
import java.io.*;
import java.io.IOException;

public class Main {
    public static void main(String[] args) throws IOException{
        int a = System.in.read();
        int b = System.in.read();
        float f = a / b;
        System.out.printf("%2f",f);
    }
}