import java.util.Scanner;

public class ChildDistribution $\{$

public static void main$($String$[]$ args$)\{$

Scanner scnr $=$ new Scanner$($System$.$in$)$;

int numChildrenA;

int numChildrenB;

int numFamilies;

double averageFamilies;

numChildrenA $=$ scnr$.$nextInt$()$;

numChildrenB $=$ scnr$.$nextInt$()$;

numFamilies $=$ scnr$.$nextInt$()$;

$/*$ Your code goes here $*/$

System.out.println$($averageFamilies$)$;

$\}$

$\}$