The product of two factors is 57. One factor is expanded by 8 times, and the other factor is reduced by 8 times. The product is ()

The product of two factors is 57. One factor is expanded by 8 times, and the other factor is reduced by 8 times. The product is ()

Because when a factor is expanded by eight times, the product should also be expanded by eight times; when a factor is reduced by eight times, the product should also be reduced by eight times; when one factor is expanded by eight times and the other factor is reduced by eight times, the product is equal to the original product, that is, 57
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