Well, darling, 0.285714 is rational because it can be expressed as a fraction, specifically 2/7. Rational numbers are just numbers that can be written as a fraction, so this one fits the bill. But hey, don't worry about it too much, just keep being fabulous!
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Rational
10.01 is a rational number
rational
It is a rational number
Such a product is always irrational - unless the rational number happens to be zero.