public class LowestCommonMultiple {
public static void main(String[] args) {
System.out.println(lcm(77, 63));
}
public static int lcm(int a, int b) {
int d = gcd(a, b);
return a * b / d;
}
public static int gcd(int a, int b) {
if (b == 0) {
return a;
}
return gcd(b, a % b);
}
}