import java.util.*;
import java.lang.*;
import java.io.*;

// The main method must be in a class named "Main".
class Main {
    public static void main(String[] args) {
        int a=10;
        int b=5;
        int n1=10;
        int n2=5;
        while(n2!=0){
            int temp=n2;
            n2=n1%n2;
            n1=temp;
        }
        int gcb=n1;
        int lcm=a*b/gcb;
        System.out.println(lcm);
    }
}