p02_ChangeTiles

import java.util.Scanner;

/**
 * Created by LittleSucks on 6.3.2017 г..
 */
public class p02_ChangeTiles {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);

        double allMoney = Double.parseDouble(input.nextLine());
        double widthOnFloor = Double.parseDouble(input.nextLine());
        double lengthOnFloor = Double.parseDouble(input.nextLine());
        double sideOnTriangle = Double.parseDouble(input.nextLine());
        double heightOnTriangle = Double.parseDouble(input.nextLine());
        double moneyForOneTile = Double.parseDouble(input.nextLine());
        double moneyForWork = Double.parseDouble(input.nextLine());

        double floorArea = widthOnFloor * lengthOnFloor;
        double tileArea = (sideOnTriangle * heightOnTriangle) / 2;
        double neededTiles = Math.ceil(floorArea / tileArea) + 5;
        double neededMoney = (neededTiles * moneyForOneTile) + moneyForWork;

        if (allMoney >= neededMoney){

            double leftMoney = allMoney - neededMoney;

            System.out.printf("%.2f lv left.", leftMoney);

        } else{

            double needMoreMoney = neededMoney - allMoney;

            System.out.printf("You'll need %.2f lv more.", needMoreMoney);
        }
    }
}