Multiplying fractions is easy:
just multiply the numerators, and multiply the denominators.
(Some people refer to this as multiplying across.)
That is:
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$\displaystyle\frac{A}{B}\cdot\frac{C}{D} = \frac{AC}{BD}$
Every division problem is a multiplication problem in disguise:
to divide by a number means to multiply by its reciprocal.
That is,
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$\,x\,$ divided by
$\,y\,$
is the same as
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$\,x\,$ times the reciprocal of
$\,y\,$.
In symbols:
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$\displaystyle x\div y = \frac{x}{y} = x\cdot \frac{1}{y}$
Here's what it looks like with fractions:
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$\displaystyle\frac{A}{B}\div\frac{C}{D} = \frac{A}{B}\cdot\frac{D}{C}
= \frac{AD}{BC}$
Where needed, input your answer as a diagonal fraction (like “2/5”),
since you can't input horizontal fractions.
Answers do not need to be in simplest form.