Answer:
20.7 --> 21
9.18 --> 9
21x9 is 189, thus the estimated product is 189.
Let me know if this helps!
positive number times negative number is negative number "(+)(-) = (-)".

we change the mixed numbers to the improper fractions

2 gallons is equal to 8 Us quarts (i need 20 words to answer, that is what this is)