先求出两个数中的最大值,然后从最大数到两个数的乘积进行遍历,如果遇到一个数可以同时整除m和n,就返回


public class Main {
    public static void main(String[] args) {
        Scanner console = new Scanner(System.in);
        int m = console.nextInt();
        int n = console.nextInt();
        int result = getCM(m, n);
        System.out.println(result);
    }

    public static int getCM(int m, int n) {
        int a = m * n;
        int max = Math.max(m,n);
        for (int i = max; i <= a; i++) {
            if (i % m == 0 && i % n == 0) {
                return i;
            }
        }
        return a;
    }
}