public class Math {
public static void main(String args[]){


MyMath a = new MyMath();


long Result = a.add(5L, 6L);
long Result2 = a.sub(5L, 6L);
long Result3 = a.mul(5L, 6L);
double Result4 = a.div(5L, 6L);

 

System.out.println("Result, Add : "+Result);
System.out.println("Result, Subtract : "+Result2);
System.out.println("Result, Multiply : "+Result3);
System.out.println("Result, Divede : " +Result4); 
}
}

static class MyMath{
 long add(long a, long b){
  return a+b;
 }
 
 long mul(long a, long b){
  return a*b;
 }
 
 long sub(long a, long b){
  return a-b;
 }
 
 double div(double a, double b){
  return a / b;
 }
}

Main.java:1: class Math is public, should be declared in a file named Math.java
public class Math {
       ^
Main.java:22: modifier static not allowed here
static class MyMath{
       ^
2 errors