package mbogomolov;
public class Calculate {
public static void main(String[] args){
System.out.println("Hello World!");}  
}
@@ -42,84 +42,362 @@
 e %7B%0A
-public static void main(String%5B%5D args)%7B%0ASystem.out.println(%22Hello World!%22);%7D  %0A
+ %09 double result;%0A %09 %0A%09%09public void add(double first, double second)%7B%0A%09%09%09result = first + second;%0A%09%09%7D%0A%09%09public void substruct(double first, double second)%7B%0A%09%09%09result = first - second;%0A%09%09%7D%0A%09%09public void multiple(double first, double second)%7B%0A%09%09%09result = first * second;%0A%09%09%7D%0A%09%09%0A%09%09public void div(double first, double second)%7B%0A%09%09%09result = first / second;%0A%09%09%7D%0A%09
 %7D

add 4 methods