Help me in solving FOODCOST problem

My issue

Error

My code

import java.util.*;
import java.lang.*;
import java.io.*;

class Codechef
{
	public static void main (String[] args) throws java.lang.Exception
	{
	    Scanner sc=new Scanner (System.in);
		// your code goes here
		int a,b,c,d;
	
		
		c='a'+'b';
		d='c'+'b';
 System.out.println(d);
	}
}

Problem Link: Food Costs Practice Coding Problem - CodeChef

@codr_sulekh123
u have to do it like this

import java.util.*;
import java.lang.*;
import java.io.*;

class Codechef
{
	public static void main (String[] args) throws java.lang.Exception
	{
		// your code goes here
		Scanner sc= new Scanner(System.in);
		int x= sc.nextInt();
		int y= sc.nextInt();
		int a= x*6;
		System.out.println(a+y);

	}
}