He then went to see the oranges being harvested. He found out that the harvest will go on for 4 days. How many sacks do they harvest per day if they harvested a total of 56 sacks of oranges?
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We know that the total number of sacks of oranges harvested is 56. 

We know that the harvest will go on for 4 days. 

That means that we need to divide 56 by 4 to find out how many sacks of oranges are harvested per day. 

We divide 56 by 4 and we get 14. 

That means that 14 sacks of oranges are harvested per day.