Alright, you can do this problem two different ways.
First Way
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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
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Way Two
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You have 3 people, and they each have 27 cards.
So, you would add them up together 27+27+27=81
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Hope It helped!! xx