Find the multiple of 81

Let's play "Find the multiple of 81!" This is how it works: There is one number in each of the boxes below, but only one of the numbers is a multiple of 81. Without using a calculator, see if you can find the only multiple of 81.

Find the multiple of 82
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Find the Multiple
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Multiples of 81
Do you know that there are more multiples of 81 than there are stars in the universe? Go here to learn all about the multiples of 81.