Given 924 x 438 = 404712, we must consider the changes made to THIS question that leads to 9.24 x 43.8 924 => 9.24: we divide 924 by 100 to get 9.24
438 => 43.8: we divide 438 by 10 to get 43.8. Therefore we should divide the answer, 404712, by 100 and 10: 404712 / 100 / 10 = 404.712