using System;
using System.Collections.Generic;
using System.Linq;

public class yukicoder
{
    public static void Main()
    {
        decimal[] n = Console.ReadLine().Split(' ').Select(x => decimal.Parse(x)).ToArray();
        decimal v = n[0];
        decimal t = n[1];
        
        Console.WriteLine(Math.Floor(v * t));

    }
}