randRangeNonZero(-9, 9) randRange(2, 9)
randRangeNonZero(-9, 9) randRange(2, 9)

fraction(A, B) \times fraction(C, D, false, false, false, C < 0)

(A * C) / (B * D)

= \dfrac{A \times negParens(C)}{B \times D}

= \dfrac{A * C}{B * D}

= fractionReduce(A * C, B * D)