C++ :

#include<bits/stdc++.h>
using namespace std;
int main(){
    int a,b,c,m=0;
    cin>>a>>b>>c;
    m=a*c;
    double x=m,s=m;
    x/=(b-a);
    x*=a;
    floor(x);
    s+=x;
    cout<<int(s)<<endl;
    return 0;
}

Java :

import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner input=new Scanner(System.in);
		double t1;
		int t,x,y;
		x=input.nextInt();y=input.nextInt();
		t=input.nextInt();
		t1=(x*t)*1.0/(y-x);
		System.out.println((int)(x*(t+t1)));;
	}
}