Alright, you can do this problem two different ways.
First Way ~~~~~~~ All three have 27 cards, right? So, you would find how many people are there as well. There are 3. So, you would do 27 x 3 = 81 ~~~~~~~
Way Two ~~~~~~~ You have 3 people, and they each have 27 cards. So, you would add them up together 27+27+27=81 ~~~~~~~