C :

#include<stdio.h>
int main()
{
	int a;
	scanf("%d",&a);
	printf("%.1f",(a/10)*1.0/(a%10));
	return 0;
}

C++ :

#include <iostream>
#include <iomanip>
using namespace std;

int main(){
	int n,g,s;
	cin>>n;
	cout<<fixed<<setprecision(1)<<(n/10)*1.0/(n%10);
}

Java :

import java.util.Scanner;

public class Main {
	 
    /**
     * @param args
     */
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int a = sc.nextInt();
		int g = a%10;
		int s = a/10;
		double sum = (double)s/g;
		System.out.println(String.format("%.1f", sum));
		
	}
	public static void printArr(int [] a){
		for (int i = 0 ;i<= a.length - 1 ;i++) {
			System.out.print( a[i] + " ");
		}
	}
}

Python :

n = int(input())
s = n // 10 % 10
g = n // 1 % 10
a = s / g
print("%.1f" % (a))