package j_25; import java.util.Scanner; public class FizzBuzz { public static void main(String[] args) { Scanner sc = new Scanner(System.in); long N = sc.nextLong(); int M = sc.nextInt(); if(N>1 && N<(Math.pow(10, 16)) && M >1 && (Math.pow(10, 4)) > M){ long O = (N / (M * 1000)) * 1000; System.out.println(O); }else{ } } }