Question 479269
{{{(-3/8a^3b)(-24ab^4)}}}

={{{(-3/cross(8)a^cross(3)^2cross(b))(-cross(24)3cross(a)b^cross(4)3)}}}

{{{(-3/a^2)(-3b^3)}}}

{{{((-3)(-3b^3))/a^2}}}


Result:

={{{(9 b^3)/a^2}}}