Tanggung jawab notaris dalam penyuluhan mengenai nilai objek perjanjian (Studi putusan Mahkamah Agung Republik Indonesia nomor 1666 K/PDT/2016) = The responsibility of notary in legal counseling concerning on the value of agreement object (The study of a judgement from Mahkamah Agung Republic of Indonesia, number 1666 K/PDT/2016)