`27.6gK_(2)CO_(3)` was treated by a series of reagents so as to convent all of its carbon to `K_(2)Zn_(3)[Fe(CN)_(6)]_(2)` Calculate the weight of the product [mol.wt. of `K_(2)CO_(3)=138` and mol. Wt. of `K_(2)Zn_(3)[Fe(CN)_(6)]_(2)=698]` .