The Wilson family will visit the Toronto Zoo for 6 hours tomorrow afternoon. Visitors at the zoo spend 40 minutes at each exhibit. Mr. Wilson knows that 40 minutes is equivalent to 2/3 hour, so he divides 6 hours divided by 2/3 hour and determines the family will be able to visit 4 exhibits. Is Mr. Wilson correct? If not, explain his mistake and find the number of exhibits that the Wilson family will be able to visit.