public static void main(String[] args) {
		// TODO Auto-generated method stub
		int num1 = 60;
		int num2 = 40;
		int num3 = 6 ;
		int num4 = 9 ;
		
		System.out.println(("時速") + ((num1 * num3) + (num2 * num4)) / (num3 + num4) + ("km/h"));
		
	}