Integer Operations

package com.company;

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
                int a = Integer.parseInt(scanner.nextLine());
                int b = Integer.parseInt(scanner.nextLine());
                int c = Integer.parseInt(scanner.nextLine());
                int d = Integer.parseInt(scanner.nextLine());
                int x = (a + b) / c * d;
        System.out.println(x);
    }
}