The only other thing you need to know that I did not explain in your multiplication question is the way to divide fractions. Dividing fractions = multiplying fractions by flipping the numerator and denominator in the second fraction.
So, 18x7 - divided by 2x7y4 = 18x7 times 6
y4 6 y4 2x7y4
Use the same process as with the multiplication question you asked earlier, and see if you cannot get:
(3x7)(7)(2x) where y cannot equal 0. E-mail me with any questions you may have. :-) ***Thanks to Nataliya for finding my error and helping out.
54 is correct, with xy not equal to 0***