这个题目怎么解！想了半天一点头绪也没有

请看题目，各位大神题目怎么写啊，木有思路求思路和源码⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯

这个是求3个数的最小公倍数吧。

思路我觉得就是求最小公倍数

import java.util.Scanner;

public class Test2 {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
int a, b, c;
a = sc.nextInt();
b = sc.nextInt();
c = sc.nextInt();
System.out.println(calcWalnutNum(a, b, c));
sc.close();
}

public static int calcWalnutNum(int a, int b, int c) {
    return getLCM(getLCM(a, b), c);
}

public static int getLCM(int a, int b) {
    int c = a * b;
    int r = 0;
    if (a < b) {
        r = a;
        a = b;
        b = r;
    }
    while ((r = a % b) != 0) {
        a = b;
        b = r;
    }
    return c / b;
}

}

        static void Main(string[] args)
        {
            int a = Convert.ToInt32(Console.ReadLine());
            int b = Convert.ToInt32(Console.ReadLine());
            int c = Convert.ToInt32(Console.ReadLine());
            int res = m(a, b, c);
            Console.WriteLine(res);
            Console.ReadKey();
        }

        static int f(int a, int b)
        {
            if (a < b)
            {
                a = a + b;
                b = a - b;
                a = a - b;
            }
            return (a % b == 0) ? b : f(a % b, b);
        }

        static int m(int a, int b)
        {
            return a * b / f(a, b);
        }

        static int m(int a, int b, int c)
        {
            return m(m(a, b), c);
        }

求三个数的最小公倍数
自增 i ,当i满足同时整除三个数时，则i为最小公倍数，i最大自增到 30*29*26，不怕超时

public static void main(String[] args) {             
    Scanner scan=new Scanner(System.in);
    int a=scan.nextInt();
    int b=scan.nextInt();
    int c=scan.nextInt();

    long i=2;
    while(i%a!=0||i%b!=0||i%c!=0)
    {
        i++;
    }
    System.out.println(i);
}