How is multiplying rational numbers like multiplying integers?

How is multiplying rational numbers like multiplying integers?
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All rational numbers can be expressed as a fraction p/q where p and q are integers.

Therefore multiplication of two rational numbers p1/q1 and p2/q2 consists of multiplying the integer numerators and denominators: p1p2/(q1q2), which is simply the quotient of two integer multiplications.

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