JEE Main 2023 Chemistry question

KClO_3+6FeSO_4+3H_2SO_4\to KCl+3Fe_2(SO_4)_3+3H_2O The above reaction was studied at 300 K by monitoring the concentration of in which initial concentration was 10 M and after half an hour became 8.8 M. The rate of production of is mol . (Nearest integer)