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.
Q: Context: He then went to see the oranges being harvested. He found out that they harvest 74 sacks per day and discard 71 of them. 

 Question: How many sacks of oranges will they have after 51 days of harvest?
A: 
153