19.(3/4)/(1/32)=24
20.(3/4)/(1/14)=21/2
21.(1/2)/(1/72)=36
No its not a prime number its actually a square number.
Had or have? You had 3 now you have 3 just 2 are eaten.
Explanation:
Distributive property: → 
Multiply by the numbers from left to right.

Then, you can also divide into the numbers.


Product it's going to be multiply by the numbers, fractions, factors, and multiples.
Hope this helps!
Thanks!
Have a great day!
What do you mean what is UW ? There is no equation