iang@shiro /tmp
$ cat A.java 

import java.math.*;

class A {
        public static void main(String[] args) throws Exception {
                BigDecimal a = new BigDecimal(1);
                BigDecimal b = new BigDecimal(1111111111L);

                a.setScale(2);
                BigDecimal hasil = a.divide(b, 2, BigDecimal.ROUND_HALF_UP);

                System.out.println(hasil);
        }
}

iang@shiro /tmp
$ java A
0.00