Given the task definition, example input & output, solve the new input case.
You are given a math word problem and you are supposed to only use multiplication or division operators on the numbers embedded in the text to answer the following question and then only report the final numerical answer.
Example: Context: Alex has 5 boxes, each box has 4 apples.

Question: How many apples does Alex have ?
Output: 20
Total number of apples is 5*4 = 20

New input case for you: Context: After resting they decided to go for a swim. The depth of the water is 9 times Dean's height. If Ron is 15 feet tall and Dean is 6 feet shorter than Ron

Question: How deep was the water?
Output:
81