Calculates time required to stay in a queue. The user enters the number of people in the queue. The fixed reception time of one person is always 10 minutes.

Hospital

namespace MyCode
{
    internal class Program
    {
        static void Main(string[] args)
        {
            int amountOfVisitors;
            int visitTime = 10;
            int waitingTimeHours;
            int waitingTimeMinutes;
            int minutesInOneHour = 60;

            Console.WriteLine("Введите кол-во старушек: ");
            amountOfVisitors = int.Parse(Console.ReadLine());

            waitingTimeHours = amountOfVisitors * visitTime / minutesInOneHour;
            waitingTimeMinutes = amountOfVisitors * visitTime % minutesInOneHour;

            Console.WriteLine($"You must queue for {waitingTimeHours} hours and {waitingTimeMinutes} minutes.");
        }
    }
}