Help me in solving WAITTIME problem

help
,
1

My issue

My code

/* package codechef; // don't place package name! */

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

/* Name of the class has to be "Main" only if the class is public. */
class Codechef
{
	public static void main (String[] args) throws java.lang.Exception
	{
		// your code goes here
		Scanner sc =new Scanner(System.in);
		int t=sc.nextInt();
		for(int i=0; i<t;i++){
		    int a =sc.nextInt();
		    int b=sc.nextInt();
		    int c =sc.nextInt();
		    System.out.println((a+b)*c);
		}
	}
}

Problem Link: WAITTIME Problem - CodeChef