Question 170074
perform the indicated operation
= [4m^3/15a^2b^2] * [45a^3b^3/8m^2n]

Cancel factors that are common to a numerator and a denominator,
such as 4, m^2, 15, a^2, b^2... to get:

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= [m/1]*[3ab/2n]

= [3abm/2n]
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Cheers,
Stan H.