In order to determine the result of the given statement, consider the amount of oz for the 3 cups and 2 cups.
3 cups 6 oz:
each cup has 6 oz, then, 3 cups will have 3x6 = 18 oz
2 cups 9 oz:
each cup has 9 oz, then, 2 cups will have 2x9 = 18 oz
The total amount of oz is the sum of the previous result:
total = 18 oz + 18 oz = 36 oz