Java get module value of blautturinteger

import java.util.*;
import java.time.*;
import java.math.BigDecimal;

public class Lautturi {

	public static void main(String[] args) {
		Blautturinteger a=new Blautturinteger("1234");
		Blautturinteger b=new Blautturinteger("5");

		Blautturinteger result=a.mod(b);
		System.out.println(result);
	}
}