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Math problem in primary school: What is the unit of the product of 1997 of 8 times (8x8)? This question is too difficult! ! !
1 8 times the single digits is 8, 2 8 times the single digits is 4, 38 times the single digits is 2, and 4 8 times the single digits is 6.

Five eights times one digit is eight, six eights times one digit is four, seven eights times one digit is two, and eight eights times one digit is six.

The unit number is once every 4 cycles,

The remainder of 1997÷4 is 1, and the number of digits is 8.

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